No real information has been released on the Wii version yet apart its the same as the next gen versions. The only game shown to the public or journalists was the 360 version for the gamer's day event.
Actually, that's incorrect.
The Wii version is developed from the PS2 version.
The DS version has been previewed and screenshots are up online as well if anyone's interested in that version.
What's confusing is there was a PSP version announced, but I haven't seen or heard anything about that lately and it may have been dropped.
As far as controls, I'd imagine it'd be similar to Ultimate Alliance, which is to say get used to repetetive punches and swings.
Of the three games he listed for Wii, I'd say Speed Racer. What ages are we talking about out of curiousity?