That would be complete idiocy if true. A proper GTA game would take 2-3 years to develop so if they're waiting for GTA:CW results then we won't see a GTA WII (excluding PS2 ports) until 2011/2012 when we might already be entering a new generation? Not happening.
I'd wager good money Take Two has one in development right now and we'll see it late 2009 or 2010.







