Not really overkill when you look at the games that the companies have already done. Sucker Punch and Insomniac in particular.
Sly Cooper series, Spyro, Ratchet and Clank. These developers develop series that release yearly, or bi-yearly as seen with Insomniac with Resistance and Ratchet and Clank. 2009 was Ratchet, only makes sense that 2010 is Resistance.