Re: What comic book characters do NOT need to be adapted.
No cutesy animal characters. They have too much of the "kid's stuff/funny book" vibe:
Rocket Racoon (I cringe knowing it's happening)
Case Study of the IMPROMPER Way to Adapt a Challenging Character: Venom, Spider-man 3.
Case Study of the PROPER Way to Adapt a Challenging Character: Gorilla Grodd, "Grodd Lives", The Flash TV Series.