I've rebranded a series of cards that are out of the superhero theme, but are still tournament viable and therefore a necessary evil for those of us (see: my roommate) who can't stomach blurry Yu-Gi-Oh! TV screen caps or stock fantasy D&D art alongside their favorite comic book heroes and villains.
Rebranding is essentially a new character name (same subtitle) and new art (esp. that matches the dice color scheme), with minor rules-text adjustments to account for silly things like "monster" and "summon" or the latest erratas.
At best, they're a Marvel/DC thematic match. At worst, they're a pop-culture reference.