While the two-part third Avengers movie could be the largest of the entire franchise, it also could be a link between all of the franchises and give the Hulk some screen time since the hero won't be getting his own solo outing until then.

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The plot of the third movie will center around the Infinity Wars as the Avengers take on Thanos. But how will the heroes come in contact with the Mad Titan? The Hulk.

While there are no concrete plans for a Planet Hulk storyline, this could be a way to give the big green guy his own story and more exclusive screen time while tying the intergalactic universe to the franchises taking place on Earth.

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This could happen with the Hulk being shot up into space following the events of the next Avengers movie (which could include destruction of some cities) where he would come in contact with the Guardians of the Galaxy. While James Gunn has said that the sequel won't tie into the movie, it could link the story in some way that doesn't require the Guardians sequel plot to be altered.

Another Avenger roaming the galaxy could be Thor after his homeland of Asgard is destroyed with the possible help of Thanos. The God of Thunder could be searching for Thanos to enact revenge and could team with both the Guardians and Hulk on a battle.

This battle would eventually lead them to Earth (with the possible death of Thor) and become the end of Part 1 of the two-part movie with the second portion taking place mostly on Earth with the familiar squad.

This will allow Hulk to have a more exclusive storyline and let Marvel use Mark Ruffalo for an expanded role outside of being a side-kick on the Avengers.