I don’t think they’ll add new hero specs but add to the talents throughout the World Soul Saga kind of like ESO’s Champion talents.
I’m guessing once we get into The Last Titan and they anounce the expansion following it , they will come up with a new talent system to replace the current one .
Maybe it will be a much simpler one then this but hopefully not as simple as the MoP -SL talent system .
Hopefully something where things that should of been base abilities with this system will be and the trees either modify or buff said abilities.