When Captain America: Civil War started production in Atlanta back in May, Marvel confirmed its cast, including several we knew about, along with a few surprisign additions, such as Ant-Man star Paul Rudd as Scott Lang, and William Hurt reprising his role as General Thaddeus Ross from 2008's The Incredible Hulk. The surprise inclusion of General Ross led many fans to wondering if Mark Ruffalo's Hulk will be a part of this massive superhero movie. The actor himself revealed in June that Robert Downey Jr. told him personally that he does have a role in Captain America: Civil War. That was never confirmed by the studio. Today, we have a new report from the German website Bild, which reveals that Mark Ruffalo was spotted partying with Captain America: Civil War co-stars Chris Evans, Anthony Mackie and Daniel Brühl in Berlin after hours.

Production on Captain America: Civil War recently shifted from Atlanta to Berlin, and Mark Ruffalo's presence in the city alongside confirmed Captain America: Civil War stars certainly lends credence to rumors that he does have a role in the movie. Then again, the actor could just be in Berlin for unrelated reasons, and wanted to spend time with the actors off set, but we don't know for sure. At this point in the production, it seems unlikely that Marvel would confirm Mark Ruffalo's appearance, but we'll have to wait and see. It isn't known exactly how long production will take place in Berlin for, or where they are shooting, but if there are any outdoor shoots, it's possible we could see the actor in upcoming photos from the set.

At the end of Avengers: Age of Ultron, Hulk took off to parts unknown in a Quinjet, deeming himself too unsafe for his team. In the comic books, it was actually Nick Fury, played by Samuel L. Jackson in the MCU, who tricked Hulk by sending him into space, since Fury is the one who believes he is unsafe for Earth. This led into the beloved Planet Hulk story line. There have been plenty of rumors about a Planet Hulk movie in development, but Mark Ruffalo explained in June that a solo Hulk movie is still several years away, since Universal Pictures has distribution rights for the Hulk character, while Marvel holds the production rights.

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As for Hulk's inclusion in Captain America: Civil War, we're not sure yet how he may fit into the story, but there have been rumors that William Hurt's General Ross will turn into the Red Hulk, like he does in the comic books. It's possible that Ross' transformation into the Red Hulk could give the Green Goliath a reason to end his self-imposed exile and help Earth's Mightiest Heroes defeat this villain. We don't know if that's true or not, but if both Hulk and Red Hulk are featured in this superhero adventure, who will these characters side with? Captain America (Chris Evans) or Iron Man (Robert Downey Jr.)? Captain America: Civil War takes place after Avengers: Age of Ultron, where both Cap and Iron Man find themselves on opposite sides of the Sokovia Accords, a new initiative designed to make each superhero accountable for their destructive actions.

Mark Ruffalo currently has four more movies left on his Marvel contract, two of which will likely be Avengers: Infinity War Part 1 and Avengers: Infinity War Part 2, set for release in 2018 and 2019, respectively. If he does have more than just a cameo in Captain America: Civil War, that will leave one more movie for the actor to appear in. It is believed that all of the original Avengers' contracts may be set to expire after Avengers: Infinity War Part 2, so perhaps we'll get to see Hulk in Captain America: Civil War and another Phase Three movie.