I think this is far too open to interpretation ... For what they are I think most games will sell relatively well, but in may cases that will require a disclaimer of *all things considered*
Ultimately, we won't know for a little while yet but I think that even with some high profile "flops" Nintendo could have one of the best selling launch line-ups ever. Games like Nintendoland, New Super Mario U, Wii Fit U, and Lego City are (almost) certainly going to be multi-million selling games; and games like Rayman Legends, ZombiU, Skylander's Giants, and Call of Duty: Black Ops 2 are likely million selling games. Out of Mass Effect 3, Assassin's Creed 3, Darksiders 2, The Wonderful 101,Batman Arkham City, Madden, Sonic Racing, Scribblenauts, Rabbids Land, Tekken Tag Tournament 2, and Disney Epic Mickey 2 there are several games which will sell over 500,000 copies and may even be breakout successes.
Please note, all the sales I am talking about are lifetime sales and I'm (kind-of) counting on the Wii U (like all systems at launch) having a limited library for the first 6 months to a year. Many of these games may get a steady 10,000 to 50,000 sales a week fro most of a year to get these sales.
