Gamestop is a retailer, to them another Wii is more exciting than another Game Cube or Wii U. I am not sure if I would get my hopes up too high just yet.
I don't know why people get hung up on what developer is doing what game because they are just names of teams people come and go. t|The "team" that made Metroid Prime might not be the same people working at Retro on the new game, it could be people left over from the team that worked on Wii Music or Nintendoland for all we know. A company like Nintendo surely doesn't force people to stay locked in one department for the duration of their career.
EAD, Rare, Retro, Intelligent Systems, Namco, Bandai, Sega, etc, they are all just names the people come and go.
I want to be hopeful NX will be awesome and so far I am leaning more towards optimistic than I was before. Optimistic can turn south real quick with Nintendo it usually only takes one slip up to throw a monkey wrench into the whole shebang.