Avengers: Age of Ultron wasn't just a blockbuster hit- it was also a tease for the next wave of Marvel films. Multiple scenes in the film are teases for future Marvel sequels. When Thor goes on his vision quest and learns of the Infinity gems, it's a tease for Thor Ragnarok (and Avengers: Infinity War). When the Avenvers visit Wakanda, it's a tease for Black Panther.

There's another piece of the future MCU that ties to Avengers: Age of Ultron which can be a gigantic spoiler for those who haven't seen the film. 

For those who have, here's the question: is Quicksilver really dead? In the big Sokovia climax of Age of Ultron, Ultron commandeers a Quinjet and fires on Hawkeye, who's run back onto the battlefield to save a trapped little boy. Quicksilver leaps in front of the bullets (at super speed, obviously), sacrificing himself to save Hawkeye and the child.

It would seem kind of definitive. Quicksilver took a bunch of bullets to the back, he fell over. He's dead. But this is the Marvel Universe, where previously dead characters (say, Phil Coulson in the first Avengers film) can come back at any time. Could that happen to Quicksilver?

According to Kevin Feige, it can't. The Marvel producer confirmed at a Q&A event that Quicksilver was dead, definitively. A user on Reddit attended the session, and relayed Feige's statemets on Quicksilver's death.

"Quiksilver is DEAD. 100%, he's not coming back any time soon, there are no plans. No LMD, no escaping bullets, no retcon. K said he is dead and wanted to make sure people understood that."

And for clarification, "LMD" means Life Model Decoy, a perfectly life-like android double that Marvel characters occasionally use to fake their own deaths in the comics. And for anyone saddened over Quicksilver's passing, here's an extra little tidbit from the Feige Q&A- "There may be long, long term plans to do something with him, but for all intents and purposes he is gone for now." So even though Quicksilver's 100% dead right now... he might not always be.