It's been well over a week since we've seen any photos from the set of Captain America: Civil War, which likely means that the production has moved indoors at Pinewood Studios in Atlanta. It may be quite awhile before we get another glimpse at the cast on set, but today we have a new rumor that teases very intriguing possibilities for this sequel, and even the Marvel Cinematic Universe as a whole. These details have not been confirmed, but if they do turn out to be true, there will be massive SPOILERS below, so read on at your own risk.

When production began on Captain America: Civil War in early May, Marvel sent out the official synopsis and confirmed the main cast, most of whom we had already known about, except for two, Paul Rudd returning as Scott Lang from Ant-Man and William Hurt reprising his role from 2008's The Incredible Hulk as General Thaddeus "Thunderbolt" Ross. According to this new report, General Ross will transform into the Red Hulk, and he will also be doing battle with the current Hulk (Mark Ruffalo) in a fight scene that will reportedly rival the Hulk/Hulkbuster scene from Avengers: Age of Ultron.

Mark Ruffalo wasn't mentioned on the official cast list released last month, but the actor did tease that he was coming back for Captain America: Civil War with a cryptic tweet that stated, "The Marvel family gets just a little bit bigger," which included the #CivilWar hashtag. Of course, in the Marvel comics, General Ross does turn in to Red Hulk, and his sudden re-emergence into the MCU came as quite a surprise to many fans. It's also worth noting that Hulk's fate was left unclear at the end of Avengers: Age of Ultron, when he was seen boarding a Quinjet and taking off for parts unknown, to protect the rest of the world from himself. The emergence of Red Hulk certainly seems like a viable reason for Mark Ruffalo's Hulk to come out of exile. What do you think about these new details?