Immortal Hulk is the first book since... I think probably Hickman's Avengers where I find myself with a huge smile on my face reading through. Like, open-mouthed, just excited at what's happening, at how far Ewing is pushing things. Lore-wise, content-wise, character-wise. It's a book that hits all the notes. And god, Bennett's art is such a perfect fit. A few of my favorite moments - I'll leave them in spoilers.
"She Was Twelve" (Issue #1) - This spread is when I knew this was going to be something special. The sheer scale of it, the immediate feeling you get when you turn the page and have that face waiting for you. Chills!
"The Brutal, Bestial Mockery of a Human" (The Best Defense) - The whole Best Defense crossover isn't Immortal Hulk proper, but Ewing is probably the main writer and mastermind, and it dovetails very nicely with the main book. It's just good stuff in general and I highly recommend it. In particular, the solo issue integrates old Hulk panels into the book, recontextualizing them, and the effect is very cool.
"An Open Wound in the Shape of a Man" (Issue #14) - Cheating, this one is two pages. But it's possibly my favorite issue of the run so far, just the way it recontextualizes Bruce and Betty's relationship. How it turns the dichotomy between Hulk and Banner from Hyde and Jekyll to something more sinister, reframing the gentle, "milksop" Bruce into just as toxic a personality as the others.
"It's Joe" (Issue #16) - This probably wasn't as big a deal for people who aren't super into Hulk lore... but man, seeing those eyes, and that title page, the whole story is just completely upended.
"This Is Me" (Issue #19) - Another cheat, but I think you need both to really capture it all. Seeing "Savage Hulk" disturbingly vulnerable, the strange, otherworldliness of Harpy's design, the obvious body horror stuff. Red Harpy in general is probably my favorite addition to the cast... building on the aforementioned fresh look at her and Bruce.
And there's a ton of others, this is just like... a top five. Seeing Brian Banner terrorizing his family, Puck's monologue about leading an interesting life, the body horror with Absorbing Man and the new Abomination, Hulk at the end of the universe... I can't wait to see where it goes from here.