Nitro
In fact, while we are at it, there are plenty of other currently uncast, white-haired Marvel villains we could throw out whom Timothy Olyphant is a winning choice for. For instance, there is Robert Hunter – a Scranton, Pennsylvania, native (and there is our connection to The Office) who was genetically altered by a group of Kree Nazis, essentially, into a human bomb who can regenerate back into his bodily form after every self-detonation. While there are many different heroes who have put up with this exploding wonder, the first was Captain Marvel (Mar-vell, specifically), so, naturally, a sequel with Brie Larson reprising her role as Carol Danvers would be the next natural place to find Nitro, potentially.