User blog comment:JMOfficial/Flash Big Bads in the Future/@comment-26618197-20170817204320

Abra Kadabra has to come back so he can fufill his end of the time loop, Eobard has to return and fight Jay because in season one he clearly knew what the helmet meant and I'm pretty sure he didn't fight Hunter or meet him so those two can form the Rogues. Of course Eobard as a big bad might be saved for the endgame.