And finally, some cosplays won't die off, but I don't expect them to multiply either:
I think Batman vs Superman is going to be a lot better than the critics fear, but the costumes are dark, dreary, and very complicated. The TV DC costumes are much easier to reproduce, so I don't foresee a huge increase in cosplayers for the DC trinity.
X-Men and Avengers
The Avengers aren't expected to have significant changes to their costumes, and many of the most popular X-Men have minimal costumes in the film versions. With so many fresher choices out there, I don't foresee a big increase in Marvel stuff because it's already very popular.
Mixed trends on this one. The latest game, Rise of the Tomb Raider, got a lot of press and a lot of people who played it seemed to like it. On the other hand, sales wise, it got wiped out by Fallout 4, and the Xbox exclusivity means a staggered launch. So I don't see a huge spike in Laras at conventions, but I don't expect her to go anywhere either.
The more anyone complains about Metal Gear's Quiet, the more guys will dress as her out of spite. And good for them. The only reason I didn't put this in the "see more of" column is that spite costumes are kind of niche market. But I salute you, Quiet crossplayers. I salute you.
What cosplays are you planning in 2016? Which ones do you hope to see? Let me know in the comments!