Avengers: Infinity War - 8 Compelling Theories About The Hulk

5. He's Pissed At Thor For Abandoning Him

That suggestion that Hulk's arc will begin to be changed in Thor: Ragnarok could offer a hint at huge friction that might appear between the Jade Giant and his former allies when he presumably comes back to Earth (or the Avengers comes to him).

Looking at the descriptions of the Infinity War footage shown at D23, there's a pretty big suggestion that Thor ends up defeated and alone floating through space. Combining that with the shots of him seemingly escaping Sakaar in the Grandmaster's own ship from Thor: Ragnarok - with Valkyrie but not Banner - and you get two suggestions that his reunion with Hulk is short-lived.

The story arc of Planet Hulk and World War Hulk (which we know are being used as influences on Ragnarok) has Hulk turned against his friends because they send him into space - what if that is replaced here by Thor's inability to rescue him for Sakaar when he escapes? Hulk's a bit of an emo after all, and seeing that sort of perceived betrayal would fit as a trigger for him.