I don’t generally worry about the whole spoiler thing much. For a start I’m not easily spoiled and secondly a lot of supposed spoilers are just rumors and speculation.
This story may be completely untrue. It is an unconfirmed rumor. But… since if it happens to be true and since it concerns the Hulk’s status towards the end of Avengers: Age of Ultron… I think most people would definitely consider it a spoiler. So… you’ve been warned… no whining.
So… the rumor goes like this:
By the end of Age of Ultron Hulk will find himself onboard an Avengers Quinjet heading off planet and unable to re-program the controls.
Which is suspiciously similar to the starting point for the Planet Hulk storyline which Mark Ruffalo has said isn’t happening. So what does that mean? Well the rumor could be false. Or they could be using that plot element to have Hulk interact with The Guardians of the Galaxy (you know they want to do a second movie) or maybe Ruffalo is wrong/lying and they are doing Planet Hulk.
Honestly I’m fine with any of those.