How Hulk Might First Appear In Thor 3

We've known for a couple months now that Thor: Ragnarok will see the Prince of Asgard work with his Avenger teammate, Bruce Banner, a.k.a. The Hulk. When we reunite with the Green Goliath, he'll help Thor defeat whatever forces threaten the Nine Realms, but what's still a secret is how he gets drawn into the third Thor installment. After all, it's not like Hulk is a major player in the cosmic side of the Marvel Cinematic Universe. Now the latest rumor says he'll be thrown into the mix via a Plan...