Each of these games are pretty different, so I'm going to guess their lifetime sales separately.
Hyrule Warriors benefits from being both a Zelda and Warriors game. Samurai Warriors 3 sold over 300,000 copies on the Wii alone, so I'm expecting at least that many sales for Hyrule Warriors there, especially after the sucess of One Piece Warriors on the PS3. In the West, meanwhile, Zelda is a big enough game to lend some star power, but has had few spinoffs. The closest equivalents are Link's Crossbow Training (a multi-million seller, but on a much more popular console) and Four Swords Adventures for the GameCube (which was on an unsucessful platform and required a bunch of extra hardware). Based on these figures, I expect Hyrule Warriors to sell something like 500,000 copies in America lifetime, or about as many as WInd Waker HD, a remake of one of the less popular entries, has sold in six months. So in total, I expect something aroun a million copies sold lifetime, but no more than 1.5 million.
Bayonetta 2 is hard to judge for its own reasons. The original sold 2 million, but its most sucessful platform, the PS3, suffered from terrible optimization. Worst case scenario, I imagine Bayonetta 2 selling 600,000 lifetime, somewhat less than the 360 version. However, with good reviews, the Wii U possibly picking up momentum after Mario Kart and during the holidays, and the possible inclusion of the original Bayonetta in the package, I feel the game can do a bit over a million sales.
Last, X.I think this game has the best potential of the trio. Xenoblade sold about 850,000 copies, but supplies were constrained in the West, especially America. Assuming X is of similar quality, and the fact that Nintendo is actually hyping the game this time, I see no reason for it not to sell at least 1 million, and as much as 1.5 million. For comparison's sake, Tales of Symphonia, a worse received game than Xenoblade, sold 1.1 million on the GameCube, so a well received JRPG can do that well on a system like the Wii U.
