I am going with The Miz and hear me out. I think he should have some sort of nervous break down, or tragedy putting him over the edge. Of course it should be some "face" that finally sets Miz off. I miss the days where professional wrestlers would take from pop culture, past, or present. Take for example Sting using The Crow gimmick, or look. I find that it would be interesting to see The Miz take on this path as well, but not as "The Crow" gimmick.
I was thinking more along the lines of the Joker from The Suicide Squad, fake grills, green hair, and leather coat. Miz is a solid character, but this would be an alter ego that has taken over and simply known as Mizery. The WWE used to take from pop culture rather often and do it in their own way. I was typically hit, or miss. Today's wrestling crowd might appreciate something along these lines. Miz has been around long enough to realize he needs to change and do it sooner that later.
I was thinking more along the lines of the Joker from The Suicide Squad, fake grills, green hair, and leather coat. Miz is a solid character, but this would be an alter ego that has taken over and simply known as Mizery. The WWE used to take from pop culture rather often and do it in their own way. I was typically hit, or miss. Today's wrestling crowd might appreciate something along these lines. Miz has been around long enough to realize he needs to change and do it sooner that later.