Developer: Epic Games
Publisher: Midway Games
Genre: Shooter
Sub-Genre: First Person Shooter
Release Date: Dec 11th, 2007
Additonal Info:
Developer: Cauldron
Publisher: Activision
Genre: Shooter
Sub-Genre: First Person Shooter
Release Date: November 13th, 2007
Additonal Info:
Developer: TBA
Publisher: Electronic Arts
Genre: Shooter
Sub-Genre: First Person Shooter
Release Date: N/A
Additonal Info:
After their Unreal Engine 3 presentation today at the Leipzig Games Convention in Germany, Epic's Vice President Mark Rein revealed that the company has been on track to produce the successor to Unreal Engine3. [Ed: Already?]
Mark Rein explained, "People don't realize this but we're already two years into development of Unreal Engine 4. It certainly doesn't have a full team yet, it's just one guy and you can probably guess who that guy is." [Ed: Not really hard to guess, eh Mr.Tim Sweeney?]
Mark Rein added that, "Unreal 4 is totally groundbreaking and totally changes the way games will be done in the future," Rein continued, "I don't expect it to be staffed up as a team for a while. But when people come to work at Epic, they know they're going to be shaping the future of the videogame business."
So according to Epic, only Tim Sweeney is working on the project at the moment and they are hiring more people to up the progress rate on the brand new engine. It's surprising how Unreal Engine 3 hasn't even become mainstream and they are already at work on a new one. Speaks volumes about their confidence to reign supreme in the graphic engine wars!

Unreal Tournament 3 Single Player Trailer
Unreal Tournament 3 Developer Walkthrough
Unreal Tournament 3 Developer Walkthrough HD
Unreal Tournament 3 E3 '07 Trailer
I wonder when they release a game using UE4.