Look like sites are jumping the gun, so we'll follow suit. Here is the trailer that was revealed at Midway Gamers' Day in Las Vegas last night. Worlds collide when Mortal Kombat wages war with DC Comics Universe in a battle to save all they know.

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Download HD (720p) Versions: Windows Media Video (31MB), QuickTime Video (38MB)
The preview article at GameSpot lets a few details out that the game will not be 'M'-rated but will feature some style of finisher, just not fatalities per se.

Also, the WorldsCollide.com website has been created and shows a newsletter signup and links to Midway's official MK vs DCU forums. (Thanks Austin Meyer) Clicking on Sub-Zero's eye brings up a secret page with 16 question marks, arranged like a character select screen. (Thanks QuanChiKiller)

If you're interested, here is the official Midway Press Release that offers a few extra details including the writers of the storyline and a Fall 2008 release date.

We are working hard to organize our information and get our coverage to you as soon as possible. Until then you can check out more at our Mortal Kombat vs. DC Universe GameRealm, where we will be updating new information in addition to right here.