Depends on a few things. When they started the conversion. What control functions they implemented, and if used any special features of the Wii U controller to get rid of certain necessities like Keyboards. Then whether they decide to beta test the Wii U version to ensure it's functioning properly and syncs up properly with the servers. Could be they do a quiet in-house test and no public beta, open or closed. There's also how many people they feel will get the Wii version then buy the Wii U version, and if their models show they're more likely to pick up the most audience by either waiting a bit and letting the Japanese consumer base get into the Wii version, or if they would benefit more from releasing the Wii U version as early as possible.
It's pretty certain Nintendo would want it to be a launch offering, and I have to wonder what level of integration the game will have with the new Nintendo Network.
Yes, I think it is very likely. --- Campaign for PT in US: http://oprainfall.blogspot.com/ ==> Two down, one to go. PSO2 = Sexy Awesome Beast of a Game!