I really do. I have never played the original on the GameCube, but did have Luigi's Mansion 2 for the 3DS which was a lot of fun. If it did come for the Wii U, I would like it to be more open though. Instead of having several individual levels inside one area, I'd like each area to be an entire level which can take a couple of hours to finish. Where you have to collect certain items/defeat certain ghosts to progress. A bit more like the original I think, but that was just limited to one mansion if I'm correct. Instead have a mansion or two, a church/graveyard area with underground tombs, etc. You get the idea.
But, even if it did have the level layout of LM2, I'm more than willing to buy the game. I really hope they're planning on making one. I'm not sure how well the series sold though. Would you be interested in a Luigi's Mansion U?