There's certainly no requirement for a new Trek TV series to be in the Abrams film continuity, but I don't think returning to the Prime continuity is necessarily the best idea at this point. That's what a lot of the old-school fanbase would prefer, but that's exactly the problem: that fanbase has shrunk considerably and is getting older. In order for ST to thrive again, it needs to win over a new audience, not just cater to the nostalgia of the old one.
You are assuming that those two things are mutually incompatible.
In a round about way, Defiance
sounds like a "perfected" version of Captain Power
, with the game and the show interdependent in terms of development and interactivity.