If anybody is still waiting for another unreal tournement title you might have to wait. In an interview with G4, Tim Sweeney, the CEO of epic games stated that they have not forgotten about the unreal tournement series but they have higher priorities at the moment. "Unreal Tournament is certainly a major long-term priority but we're planning not to release a major retail game in the series for several years. So we have that effort somewhat on hold while we work on a few other initiatives. " He also stated that. "Making the toolsets available for mods and map creation, the series goes beyond anything the studio could ever do." "The really interesting thing about Unreal Tournament is that once we've defined the game in this generation the community takes it and runs with it. So you've seen the community create this massive set of maps and mods that go far beyond anything we could ever do," Sweeney added. "We almost solve the Unreal Tournament 4 and 5 problem ourselves by just making this toolset available because the community has done more than we could have ever hoped to do internally."
Source: http://au.ps3.ign.com/articles/100/1007241p1.html