Plans to reboot Unreal Baseball have been announced. Stefan Klein, lead developer, had the following to say:
"It has been quite some time since I have done anything with Unreal Baseball, but I am wanting to bring the project back! I had discussed switching engines to id Tech 4 because of the GPL release of the engine, but seeing as the UDK has been released I could use Unreal and still make a standalone game (and maybe even for mobiles). I will be starting from scratch. Progress may be slow, at least for a while, but I really do want to get this project going again, and I'll keep everyone updated as it moves forward!"
Exact details, such as which engine will be used and a release date have yet to be announced.