DC the Source have been teasing the big Flash storyline that was announced at the end of last year's Flash: Rebirth. Personally, I saw no reason that Barry Allen needed to be brought back, as his successor had been doing the job admirably for 20 years with fairly strong sales. After losing interest after the first 4 issues of the new Flash monthly, I'm interested to see what this storyline can do to revitalise the Flash family (after all, Wally West is still the Flash as well, but we've hardly seen him since Barry returned).
From the teases below, it looks like this will be an alternate timeline story, which is in keeping with the Flash's history, featuring the Justice League, if not the whole DCU.
A reference to Martian manhunter, J'onn J'onz?
Abin Sur never crashed, so he couldn't give Hal Jordan the Green Lantern ring?