For those who wish to contact me on Xbox LIVE, my main account is "The 7th Taco", and the one linked with my profile here is only a backup.
Well I know over in the Community forum, there's people speculating that it could be revealed at the VGA's along with Bungie.next
But we won't know until something happens. Bungie's really quiet about everything, however, there was a video recently (From Gamespot I think) that said Destiny is "quite like Halo" in terms of alien-type design.