According to the fan site "Cosgrove Hall Ate My Brain", and 3D World Magazine, there is a new DangerMouse feature length film in the works. It still seems to be in the planning stages, though.
There's also talk about a DM computer game as well.
The story, transcribed from 3D World, is available here.
By the way, if you look around on the Cosgrove Hall Ate My Brain site, you'll find another story about a "live action" DM movie. That report is so false, it's ridiculous! It was obviously made as a joke.