There is no movie franchise as obsessively picked over as the Marvel Cinematic Universe. Fans might have endless discussions about Star Wars: The Force Awakens, its sequels and spin-offs, but they only have so much material to work with. They can ponder on the future of DC's own comic book adaptations, but they're only getting started.
The Marvel films, meanwhile, have decades of comic book source material to drawn on. On top of that, the long game played by the studio means it has plot threads that were introduced years ago which still need tying up, countless balls in the air with fans anxious to find out how exactly when and how they'll land. Some get impatient.
That's how you get to the endless treasure trove of scuttlebutt, rumour, hearsay and home-spun theories about the direction the MCU is headed in. Will the new Spider-Man be part of the Avengers, or is he too young? Will Scott Lang only inherit Hank Pym's Ant-Man persona, or will he rifle through the endless gimmicks his mentor tried on?
Some of those rumours aren't worth the bandwidth they're printed on. Others actually open up interesting possibilities, fascinating new twists, and suggest fan-favourite comic characters might soon be heading to the big screen – and they're believable. Here are ten of the most compelling theories about upcoming Marvel movies.