With Es2 having its own faction based short stories, i was wondering, will we see the same for endless legend, being one of, if not the most fleshed out game in the franchise, will we see a short comic story for each faction as well? Say a story about Namkang and other 6 Drakken heroes, or a story about the allayi and their grudge against the drakken, maybe one between the vaulters and the forgotten?

Probably not. While it's nice that they've still added content to it this game is 7 years old. Unless they're fan made I don't see AS putting that much work into it, unless it was for promoting a new Endless Legend.