Considering you have three third party games that stood a chance on the Wii.
If they add even more content, the fans would probably rebel. Remember the Japan petition? Think that times 5. They already got suckered into paying for the same game twice. Three times? It would get ugly. Would Japan do it? Probably, considering they seem to have enough money to drop 30 bucks for a set of title costumes.
If Namco is trying to push Tales in the West, they are doing a terrible job. No marketing, no advertisements, about 6 or 7 tales games never released to the west and counting, and pretty much little communication with the American Namco site. What are they working on instead? A Wii cooking and dance game, and Clash of the Titans. Break out the party hats. Tekken 6 seems to not be living up to expectations, either.
And the PS3 and 360 fanbase is untested in those regards. But considering that many PSP owners have a PS3 or a 360, I wouldn't doubt it. And considering those two bases are more oriented around gamers rather than casual gamers, I would like to see it actually have a shot.