12 Ways To Make A Hulk Movie That Doesn't Actually Suck

9. Introduce The Rainbow Hulks

General Thunderbolt Ross is already coming back to the MCU, helping to convince everyone that superhero regulation is a good idea (if not registration) because he's witnessed what wild cards like the Hulk can do. Having his personal journey culminate in him using Hulk's DNA to turn into Red Hulk in an attempt to level the playing field would be an easy way of bringing big Red into the MCU.

Because we all need more multi-coloured Hulks, whether you like it or not.

And it's not just because it means you get more Hulk for your buck: the different Hulks should be brought into a stand-alone movie the way Peter David explored them. David used each colour as a manifestation of different aspects of Banner's psyche: savage Hulk happens when he loses control, Green is his rage, Banner is his "normal" setting, grey is his cunning side.

Seeing them all wrestling for control - without explicitly having him go into therapy as he did in the comics at one point (seriously) - would be an important background element.