To follow up:http://www.reddit.com/r/starwarsspecula ... a_bridger/
This theory def fits with the ages of the characters and timeline.
Ezra would almost be like the anti-Luke (who might replace Starkiller/Vader's Force Unleashed Secret Apprentice).
Lor San Tekka might even be Kanan at this point, especially since he has lived through everything. If Obi-Wan can change his name, why not Kanan. watching over Rey could be his redemptive act ala Kenobi with Baby luke.
Remember, back in 77 to 80, prior to Empire, everyone believed Vader killed Anakin and all the literature supported this.
Also, from a creative standpoint I am sure disney is going to move ahead with their own created characters instead of the Lucas/legacy characters. Rebels and also BB-8 becoming >/= to R2 would support this.
On the other hand this all might be reading into things waaaay too much