Between the ending controversy and the lack of Mass Effects 1 or 2 on the Wii U (that we know of), I don't see any reason why anyone should buy this version of the game. If you don't have a PS3 or 360, get the PC versions of the trilogy. If you don't have a powerful-enough gaming PC...get a better one. Seriously, this is like starting the Star Wars trilogy with Return of the Jedi or your favorite serialized TV series with the last episode.
And no, if Mass Effect 2 PS3's terrible "interactive comic" is any indication, EA is not likely to make a recap for ME3 that would be an appropriate substitute for the actual Mass Effects 1 and 2.