I was hoping no one would make this thread.
The source is apparently DasVergeben. Let's look at his
past leak to find out how credible he is:
Street Fighter V: Arcade Edition:
Season 3 characters include Sakura, Sagat, Cody, Sodom, 2 newcomers (I heard 2 Final Fight newcomers from one source, but Roxy and a Shadaloo Doll from another)
Marvel vs Capcom Infinite:
Season 2 as of the last update I heard from various sources compiled together will be Star-Lord, Ms. Marvel, Asura, Gill, and Lady, but the last character is one not everyone I've heard from has been able to agree on. There being multiple characters in development is likely to blame. The majority of them say Rashid while others have said Regina and one even said Apollo Justice.
Devil May Cry 5:
This will finally be announced at PSX. Dante, Vergil, and Nero will all be playable on the game. I don't know if that will be confirmed at PSX in particular alongside the reveal, but multiple sources have informed me that all three characters are on it and you can play as them.
Dragon Ball FighterZ:
3 of the DLC characters I've heard of include Broly, Base form Goku (it was noted to me that he does use the Spirit Bomb), and Base form Vegeta.
Soul Calibur VI:
I was told it'll be for PS4, PC, and Nintendo Switch. There was no Xbox One version mentioned to me yet at least.
NINTENDO:
Metroid Prime 4 should have something revealed with some in-game footage early next year from what I've heard.
Mother 3 is real. According to my source, it was completely localized and playable. The sad thing that I've heard is that it is being held back for some reason, which all I know has something to do with not knowing which month to release it in.
According to one of my sources, they claim that Square Enix is doing The World Ends With You 2 exclusively for the Nintendo Switch.
Blizzard is preparing a Hearthstone port for the Switch. I'm not sure when this will be announced due to the phrasing, but I heard about this when I went to Blizzcon.
SO UH...