Everything Is Canon
Everything is canon in the Exstellarverse. If you've got an idea, it's probably canon, if you want it to be. :P ...That's it!
To break the 4th wall a bit, this is really just me saying if you have a cool idea for this, lemme know. I might consider putting it in. Am I gonna profit from it or something? Noooonono, the idea is still yours. Really, this is just me saying "I like fan made stuff and encourage it."
Of course, really bad ideas we don't speak of, as they're in Dimension T, but that'ssss that. Common sense, you know.