User blog comment:ARagingKid/ARK's Thematic Thumbnail Contests/@comment-32295718-20180327161800/@comment-27367414-20180327175147

For all of those themes, I'm expecting the following characters if they do occur:

Gods - Thor

Monsters - Any Pokemon/Digimon

Future - Trunks

Cartoons - Any MLP character

Anime - Goku

Villains - Thanos and Darkseid

Space/Aliens - Superman