Throughout the first ten years of the Marvel Cinematic Universe's historic run, we've seen many villains come and go, many of whom never making it past a single film - or even television season - before being killed off. A select few, meanwhile, have returned for more than one outing to serve as thorns in our heroes' sides, like Loki, Wilson Fisk, Grant Ward, and Thanos.
There's also a number who have survived only to disappear after their initial introduction, either incarcerated or off roaming free somewhere, though deserving of returns either for the sake of closure or because of what their reemergence could mean from a narrative standpoint. They've been gone for years, sure, but they're not forgotten. As the surprising return of the Red Skull in Avengers: Infinity War and the long-awaited arrival of Graviton in the fifth season of Agents of S.H.I.E.L.D. proved in 2018, the franchise is clearly open to playing the long game with its evildoers.
As such, let's take a look back over the MCU's history at the villains whose absence has been felt and have earned another go-round in the franchise, with a few stipulations: They must be MIA since no later than 2016 - which means villains from 2017 and 2018 are sitting this list out purely due to recency - and they must, of course, still be alive.