KennGalaxy

In order to be successful in the "hardcore" arena, Nintendo can't accept being looked at as a second tier console, By fans and/or developers/publishers. It has to start with Nintendo making an effort to secure damn near every 3rd party game that come out on PS3/360, and hardware willing, PS4/720.

Gamers that Nintendo are expecting to switch from 360 or PS3, are going to want to still be able to play those big 3rd party games like Mass Effect, Skyrim, GTA etc...
There goal should be to make there console a one stop shop, too many people had a Wii and____. If they want "hardcore gamers", they can't market the WiiU strictly as a novelty console, but instead show how good the 1st,2nd, and 3rd party support will be and the online features.

That's what will win them back a lot of that crowd, and also what will help them retain it.