Not really any credible sources though. Anyone couldve written it up. Especially with the avatar and the main Lord seeming diametrically opposed at the start, I'm unsure of the validity of it.
While I dont have much to say for the next game (16), I'm guessing that 17 will use the same engine and be a remake of FE4 (Genealogy of the Holy War).
I'm not really sure what all we can guess for 16. Itll probably be an original game since the last one was a remake, and I feel like well move...