Your Shape is selling okay but getting beaten by EA Sports, The Biggest Losers and others. The camera seems to be a detriment as it's increasing the price but not being seen as a selling feature by most people. Of course, Ubisoft hasn't effectively marketed this either.
The fact they are further supporting their camera with Raquet Sports is interesting but again, without some marketing to generate some hype I think that novelty will be lost on the masses. And frankly, I doubt it'd be better than playing with WM+.
I already have tennis and table tennis with MW+ so it's a non-issue for me and I'm sure most Wii owners will be content with the tennis and table tennis they have in Wii Sports/Wii Play. I don't expect this game to sell.