Yes, Patch 5.1
is bringing a whole new hub of Alliance/Horde conflict, and in addition, it's bringing in the full might of the Alliance and Horde fleets to get the combat starters. MMO-Champion
has both the Alliance and Horde cinematics up now, so take a gander at the Alliance one (above) and the Horde one after the cut.
Things are definitely heating up. I was going to say hotting up, but I have no idea who'd get the reference.