Or maybe they actually don't think there's a clear winner.
PES sold fantastic on PS2, PS3, X360, and bombed on Wii. Konami cares about that, right?
PowerPro Baseball also sells vastly better on PS2 than Wii, despite the PS2 being a poddering old system vs. a new, great-selling Wii system.
Likewise, DDR has sold fairly well on the Wii, and Konami is probably happy with that.
So in Konami's eyes, they've had mixed succuesses on every platform. If Wii owners don't care about sports games (which to this point, they haven't aside from Wii Sports and Tiger Woods), how exactly would they dominate the huge chunk of revenue that's from their sports titles if Wii owners don't really give a crap? (look at Winning Eleven DS for further proof).