Sad to say that Apocalypse might be the last Motorstorm because I just read their new game is more on-road than off-road. Apparently they tried proposing a spin-off of Gran Turismo but was told not to proceed by Sony Japan/Polyphony Digital. The link hints at an arcade racer as they've just hired a bunch of Blur devs after the team got let go by Activision and also the Wipeout devs from Studio Liverpool. Looks like they've got a big team for the next racer, hope it translates into a great game.
NINJA EDIT: Misunderstood the article a bit and have edited post accordingly.
SHEEP, SHEEP, SHEEP! It's OVER! Never again will the day's of old return! Wish upon a star! Mods, Please clean up the dust bunnies around this forum. My allergies can't take it. Sneeze, cough!