Warning- This article contains possible spoilers for Captain America: Civil War.
Captain America: Civil War is seeming more and more like Avengers 2.5 everyday. With a large slate of villains, and almost all of the Avengers (past and present) cast for the movie. Now we know that Thor will most likely be in a space figuring out the Ragnarok mystery, and the Hulk will most likely still be on his "soul searching" thing we saw him on at the end of Age of Ultron. But, that leaves one of the casting choices peculiar: William Hurt returning as General Thadeus E. "Thunderbolt" Ross. Unless Ruffalo does eventually get cast and the Hulk is in the film, Ross will have no real reason to be their. So what will Ross be doing? Well, I have two theories as to what he will be doing.
He is Working for S.H.I.ELD.
If you are familiar with the comics, you will know that there is a special force created by S.H.I.EL.D. called the cape killers tasked with hunting down superheroes that are against the superhero registration act. One would think a special task force like this would warrant specially powered people to help with that. Cue the one person with blood samples of the Hulk, Thadeus Ross. He is hired by S.H.I.E.L.D. to outfit the cape killers with the special powers of the Hulk. However, he tests the blood on himself and, after that test goes awry, S.H.I.E.L.D. stops that attempt at super powered cape killers all together and let's Red Hulk go on his angry way.
He is Part of the Thunderbolts
This is my second, final, and most possible theory. If you have read the Civil War story line, you know that the Thunderbolts play a significant role in the story. So far, we don't know of any definite Thunderbolts in the film, but it would make sense for Ross to be the first one. Plus, his nickname is Thunderbolt.
So what do you think? Could Ross be the founding member of the Thunderbolts? Could he just be in there so Marvel can introduce the Red Hulk? Also, I'd like to know any pros and cons of this article. I'm fairly young, and not the best writer, so anything you say I'll take into consideration. Thanks for reading!