Avengers Age of Ultron
Robert Downey Jr and Mark Ruffalo in Avengers: Age of Ultron Marvel

The ending of Avengers: Age of Ultron left The Hulk's storyline on a cliffhanger. With The Avengers (and the fans) having no idea about Bruce Banner/Hulk's whereabouts, rumours started circulating that the Green Goliath will return in the 2016 movie Captain America: Civil War.

So, will Hulk be a surprise element in the upcoming superhero team-up flick? Actor Mark Ruffalo 0 who plays Hulk in the Marvel movies – addressed the rumour in his recent interview with The Daily Beast.

"I don't know! I heard a rumour about that the other day," said Mark Ruffalo when The Daily Beast asked if he will return in Captain America: Civil War. "I haven't seen a script, nobody's told me, and I don't have dates. But I can only hope so! I was talking to Robert Downey the other day, and he said, 'Ruffalo! I heard you're coming out here,' and I said, 'OK! I'll be there,'"

So, there we have it… not exactly a complete denial from Ruffalo. Maybe the Marvel folks will bring him in for a cameo appearance or an end-credits scene.

Meanwhile, Ruffalo went on to talk about the positives of being associated with Marvel Studios and the overall reach of its superhero films.

"I like the challenge of it," the actor explained. "I like the cultural significance of it, as an art project. It's crossing into all kinds of cultures, and belief systems, and ideologies. It's hitting a lot of boxes, and really specialized boxes, too.

"And ultimately, the messaging of it is pretty good! It has a decency about it. I always feel like this is our modern mythology, in a way. We've been doing this since the time we could draw on cave walls. This is our version of it now, but we're still working out the same stuff — violence, brotherhood, and more."

Ruffalo is expected to reprise his role as Bruce Banner/The Hulk in the Avengers 3: Infinity War, which is slated to release in 2018.