Yes, Mario is announced for Super Smash Bros for Wii U
No, there is no Minecraft for the Wii or Wii U, and no plans to do so have been announced.
As of May 2014, there is no specific release date announced for Super Smash Bros Wii U. However, it is announced that it will come out sometime in Winter 2014
Yes, it was announced on the E3
Capcom has not announced a Wii U version of Marvel vs. Capcom 3. The only fighting game currently out on the Wii U is Tekken Tag Tournament 2: Wii U Edition.
No, there is no Minecraft Game for the Nintendo Wii U. However, it was announced that Minecraft Story Mode will be coming to the Nintendo Wii U
No it is currently only for XBLA. A PS3 version of the game is pending, but no release date has been announced.
They announced a new one for the WII U and Nintendo 3DS
Mario Kart has been announced for the Wii U, but no details or release date has been set. It is expected that more information will be available at E3 later this year.
Super Smash Bros for Wii U has been announced to be released on November 21, 2014 in NSTC and December 5 for PAL regionsMasahiro Sakurai stated that the Wii U version of Smash Bros will be released on November 21st.
It's not called the Wii 2, but a new Wii console called the Wii U has been out for two years as of this answer. Back in 2010, when this question was asked, the Wii U hadn't been announced yet, so there would have been no way of knowing if there would be one.
Yes, Mario Kart 8 is announced to be released in May 2014