Wasn't Code Chronos supposed to be an action game like the 3D Ninja Gaidens but starring other DoA characters instead of Ryu?
Granted, it was probably just going to star Kasumi or Hayate instead.
For branching out to other genres, they could try a Hitman/Splinter Cell style game starring Bayman or Christie.
Or a 4-player co-op side-scrolling brawler where Elliot, Brad Wong, Gen Fu, and Ayane get mixed up in some plot or another and have to fight their way out of the city, like Final Fight or Streets of Rage.
They could also do an Uncharted/Tomb Raider style game starring Zack and Niki looking for treasure and fighting skeletons and such.
