Well I played a bit last night and it's pretty fun.
Basically, you control a demigod which is either an assassin and can't control any other units of its own, or another demigod general which can summon minions.
You start out at level 1 every game and gain experience and powers and stuff, and work with a team to control parts of the map or defeat the opposing team's base.
There is no campaign and it seems to be designed around multiplayer gaming only....which brings me to my next point; the online system is absolutely dreadful. Joining/hosting a game is extremely buggy and you can spend 30min - 1 hour trying to set up a game.
The connectivity system implemented is P2P, which is a good idea, but it seems they have a lot to fix...and I'm sure they will fix it.
It's a fun game and I would say go get it once they fix the multiplayer....otherwise it's quite frustrating.