Mid-credits
Someone has run out of patience with people doing his errands, and picks up a gauntlet.
Thanos: fine, I'll do it myself.
Leads to Avengers: Infinity War
Marvel Cinematic Universe
An attempt to build something that would let everyone go home works exactly as well as that has ever worked.
Mid-credits
Someone has run out of patience with people doing his errands, and picks up a gauntlet.
Thanos: fine, I'll do it myself.
Leads to Avengers: Infinity War