I hate to say this but this synopsis reminds me a lot of the third season of Enterprise.
Detonate the fleet? It was one thing to wipe out Vulcan but the entire fleet? That's overkill. Then again, just about every Starfleet ship that popped up on the original series was either destroyed or heavily damaged.
I hope we get some classical Trek elements to go with what seems like another action/revenge film. Still, I'll reserve judgment. I loved the last Star Trek film and it seems like this movie will focus more on Kirk with the crew. So we'll see what happens.