I would be surprised if they manage to get something like that working by then. For now, all they have is a small team of devs and a working combat system that works in small groups. Not saying it can't be done, but I would not be making any big plans.
If I remember correctly, in the mmorpg forums one of the devs mentioned that they wanted to bring us a glipmse of a much larger battle (don't know the size) in a open world. My quess is that they'll show us a larger battle, but not with 1000+ players but instead, something around 100 players fighting in a open world.
What about Eternal Crusade merchandise?? All the shiney new Eternal Crusade Bitz and Accesories you could want, with the proceeds going to help make the game Put me down for an EC onesie and Ripper shaped slippers. (Say it, i dare you. Ripper slipper. You love it)
Hoping they'll announce something awesome with regards to gameplay. Like how Siege Mechanics will work.
maybe a christmas ARG? or some chosen will be able to join the server? ;D or just another gameplayvid, maybe with orks and eldar