From this interview, yes another interview

http://www.avclub.com/articles/legend-of-korras-michael-dante-dimartino-and-joaqu,72359/

Again an interesting interview that is great on the behind the scenes stuff, but when asked about working with Dark Horse, , Mike said this

I’ve been working with Gene pretty closely on the first three books, and then we’re actually just starting to come up with ideas for the next batch of stories. But it’s been a great collaboration, and it’s nice to be able to tell some more stories in that fold, with the old characters, without having to do the entire animation part of it.

Key parts are bolded, this is the first full mention of a possibility of new Avatar comics. What could these be about ?

Speculate in the comments below.