Well its a tough call, cause there are multiple scenarios that could put either Wii or PS3 in first, but Wii definetly does have the best chance. So I don't know if I can say for sure yet but I do know that Wii can't get last, and 360 can't get first. I guess I'll just give my most likely scenario:
1. Wii- 90 million
2. PS3- 60 million
3. 360- 35 million
But once again this is the most likely scenario, but not the only one. I don't have enough data to accurately give my answer with full confidence.