I don't care about relaunch #'s, I usually trade wait for the most part.
What I am interested in is seeing a Shazam ongoing. I'm guessing it will be a relaunch, with some continuity alterations but still set on prime earth. Titan's hunt seems to be reforming the titans group, so maybe you'll see pre-flashpoint Wally return. I'm hoping to see the JSA return as well.
I'm guessing their goal will be to promote the core franchises & movies. So all the characters on the DC film slate will get an ongoing, plus suicide squad. Maybe the bimonthly ongoing rumor will be true as well, and they'll double down on Batman, Justice League and Harley. We may get Dark Universe as well to go alongside the movie
I really doubt there will be significant alterations to move the comics in line with the TV's and movies. DC has tried in the past to do that and it fell flat on it's face. There's digital firsts that tie in with shows directly that are available for that crowd.