Can you imagine if the MCU version of the standard, green Hulk went on a rampage? Imagine just how much damage he could do? Well Red Hulk could provide that same amount of chaos. In the comics, Red Hulk was created to be an uninhibited, tactically intelligent adversary to the Hulk and initially went on an uncontrollable rampage, proving the danger he poses on a massive scale by killing established Hulk villains such as Wendigo and Abomination, destroying S.H.I.E.L.D's Helicarrier and defeating several superheroes, before finally being subdued by the combined efforts of the original Hulk and Thor - a Green Hulk versus Red Hulk battle on screen is surely something that all Hulk fans would love to see. Red Hulk was later revealed to be General Thaddeus "Thunderbolt" Ross, a character already established as being part of the Marvel Cinematic Universe, so bringing him in to an on-screen storyline wouldn't be as difficult as it would be to bring in certain other characters. It's also notable that Red Hulk later reformed and joined the superhero team the Avengers, which could ultimately give the big screen version of the Avengers some extra muscle in the movies if he was to reform on screen in the future. Mostly, it would just be cool as hell to see two hulking Goliaths of opposing colours fighting it out in a CGI battle on the big screen, after having witnessed the Red Hulk making a big mess of the MCU's Earth.