Hulk know the Dark Knight trilogy ended with Dark Knight Rises, but Hulk think if they were to make a fourth film, this is how they should do it:
After 3 years, Batman finally comes out of hiding after his supposed death. At the same time, a scientist transforms into a giant rampaging crocodilian creature, dubbed by Gotham City as Killer Croc that begins going on a rampage. This may actually be Batman's toughest adversary yet.
Hulk think this would be a great design for Killer Croc in this film. He would be portrayed entirely in CG and be voiced by Hugo Weaving.
Hulk wish they used Killer Croc in Dark Knight Rises. Not that Bane was bad choice, he was good choice, but Hulk think Killer Croc would've been just as good.