There is no official abbreviation! Some people call it RE2make and others REmake 2 (I've seen more as well, but there are the most common).
Okay then, you've opened a can of worms!
CAPCOM is really going for
plausibility this time around. Not necessarily 100% realism (it is a game with zombies and giant alligators after all), but they're trying hard to get players immersed in the atmosphere and world of RE2, as well as getting you attached to/relate to the main 4 characters. I won't touch too much on Leon/Claire/Sherry but for example, they made the latter act a little more grown up and more mature to give her an emotional side to make you care about protecting her and acting like her guardian as opposed to thinking of her as an annoying brat you're forced to escort to safety.
The most obvious thing CAPCOM is trying to ensure of this time around with Leon and Ada is that they want their "falling in love" plot to seem, again, plausible. It was ridiculous how they caught feelings for each other so quickly in the original especially with how cold-blooded Ada was, you'd almost think her falling in love with him was just a part of her plan to get him off of her dick so she can escape on her own and accomplish her mission lol.
This remake has the potential to be some of CAPCOM's most remarkable written work yet. Hear me out: they are changing so much about the Ada and Leon dynamic specifically, and fleshing out both of their characters so well IMO.
- Ada no longer has the "I'm looking for my boyfriend" subplot
Instead of introducing her as the "I'm lost and confused" character, she's instead introduced as a very professional, competent and cunning one. Her first appearance to Leon is her saving him from a mutated dog that's about to maul his face off. Right after, she explicitly orders Leon to leave Raccoon City instead of playing-pretend that she has no idea what's going on. Right off the bat this gives us the vibe that this character is competent, daring, blunt and even dominant. Get this: Leon is a police officer who gets saved by a random "normal" person who has the
audacity to tell him - an authority figure - to leave the town "before it's too late". This sets the stage up for Ada as a character: she's competent, as showcased by her sharp-shooting skills when saving Leon from the dog. She's daring and confident enough to tell a police officer to "get the hell out of here", and then when Leon plays his authority figure card and presses for more information from her, she further proves that side of her by declining to answer. "Sorry, that information is classified," she says. Mysterious, but bold and cunning; in one scene we already see some of the defining characteristics of hers conveyed perfectly.
- Ada is no longer just a random "civilian" to Leon, but from the get-go Leon is aware she's a highly skilled secret agent
This is a huge change. Later on, after an emotional scene between Leon, Ada and some other characters. Leon vents to Ada about his mission and purpose, Ada is seen to be slightly moved by what she'd just witnessed (and perhaps by Leon's naiveness as well), so she finally decides to disclose her intentions -- or so we think. She tells Leon that she is a secret agent sent by the government and her mission is to eradicate Umbrella and stop Annette, one of the people responsible for the creation of G-Virus. Leon's mission is to help people as much as he can, and Ada's "mission" is to save the world by destroying Umbrella's operations. This is actually pretty smart from her; she says she's a government agent, when in fact she's
not (she's an undercover agent, but
not for the government). Saying that she
is an agent of some sort will help her by not throwing Leon off over any of the gadgets/weapons she possesses, and he won't question her survival abilities thinking she might be lying about who she is had she said she was just a civilian. She does not tell him she's a spy working for Wesker and all, she's acting like a goodie-two-shoes sent by the government to "stop" the bad guys to humor his naive perspective and win him over. When in reality, her objective is to actually just steal a G-Virus sample, and doesn't require "stopping" or killing anyone or anything necessarily.
- Leon and Ada's serious/jokster personalities are perfectly balanced and complimentary of each other in the remake
In the original, Leon and Ada were both serious -- and when they were funny, it was unintentional, as it was never the intent by the creators. When Leon and Ada undergo their ACTION SUPERHERO transformation in later action RE games, they suddenly gain all the sarcasm and one-lines in the world and have that embedded into their dialogue. The remake ties their old personalities with their new personalities flawlessly. Both of them are serious when they need to be and relieving tension by cracking jokes when they need to. This is amazing because in RE6, Leon has become too serious where he lost all of his charm from RE4, and the opposite happens for Ada: she becomes too snarky in RE6 where you don't even feel like there are any stakes at all playing as her -- she acts like a Mary Sue, and if she doesn't care about any situation she's in, why should the player?
Here are a few examples for both characters:
Leon: Serious
After witnessing an emotional event happen, he gets frustrated with how he doesn't feel like he's in control as innocent people's lives are being taken away right before his eyes. He vents to Ada about why he even joined the force to begin with, and his "purpose" in his life, and you can sense the frustration in his tone.
Leon: Serious, Ada: Joking
After fighting the giant alligator:
A: "Can't say I didn't warn you."
L: "You said the virus changed PEOPLE into monsters, not reptiles!"
A: "......fair point."
Leon: Joking, Ada: Serious
After saving Leon from an encounter with Mr. X, Ada shows her annoyance with acting like a guardian angel:
A: "I'm getting tired of saving your ass, that's twice already."
L: *catching his breath after almost being choked to death by Mr. X* "..I didn't know you were counting!"
A: "Look, this is NOT a game!"
Ada: Joking
When Leon is unconscious, and we get to play as Ada. She reveals her hacking gadget, "it's secret weapon time!" And then hacks a control panel and overloads an electric fan until it explodes, "...candy from a baby."
Last but not least, Ada's trenchoat and glasses represent her having her walls up and being emotionally "guarded". But slowly, as she and Leon rely more and more on each other and they become a team she opens up to him and learns to trust him more -- hence losing the trenchcoat and glasses, symbolizing putting her defenses down and allowing herself to be vulnerable with Leon, until she ultimately catches feelings for him after his acts of selflessness, especially for her.
There is seriously so many more notes that I have, but I think I overstayed my welcome in this post lol and I touched on the main points I wanted to cover. So excited for January 25th!