In order to gain popularity (and not only), early versions of Debian were named with code-names inspired by the characters from "Toy Story". Infact Bruce Perens, the second leader of the Debian Project, was employed in Pixar Studios at the time Toy Story was produced.
I think code-names inspired by Marvel, DC or other comic/video-game/animated-cartoon/movie characters might be a good idea.
For example...
Deadpool
Cable
Black Widow
Black Panther,
etc.
In any case, whatever code name you choose will be fine.