It won't need the motion controller as DualShock 3 will do fine. Brunswick Pro Bowling however has been built specifically for the tech.
Wii Sports Bowling was huge when it hit Nintendo's motion loving platform, so it stands to reason that Sony want to capture some of the hotness with Brunswick Pro Bowling for themselves. Microsoft likely has their own cooking up too for Natal.
Fear not because the kids who want Toy Story 3 the game don't actually need the PlayStation Move controllers, they're purely optional, though Sony is likely to remind you every step of the way how extra awesome it would be if you had them.