Thats why the Hulk expands his brand. Why settle for regular green Hulk when you can also get Red Hulk, Grey Hulk, Smart Hulk, Rampaging Hulk, Future Hulk, etc? And then you have She-Hulk, Red She Hulk, Savage She-Hulk, A-Bomb, ad nauseum.
The Hulk knows that once you identified something that consumers like, its important to build off of that preference. Tweak your brand a little here, a little there and you can ram different variations down the consumers' throats for all eternity.
I mean, you can never have too much of a good thing. Right?
Variant Cover to "Prelude to Deadpool Corps #1" by Ed McGuinness
... I think I smell "Ecocomics X-Treme" on the horizon...