I think they'll include a remote to try to justify the $350 price I'm convinced they're going with. They sell for $40, but I'm sure Nintendo's making a pretty nice profit on that at this point, and some of the games in Nintendo Land require one anyway.
Is there a need to though? The Wii U's market will be almost entirely the same as those who already own a Wii. There will be very, very few people who buy a Wii U who don't already own a Wii to begin with, and as Kairon pointed out for these very few people the Wiimotes are available on shelves right next to the Wii U. There's no need to bundle it when so many people either already have it or can easily get it separately.
I think a slightly more reasonable alternative might be if the Nintendo Land game comes bundled with a wiimote just like Wii Play or Wii Sports Resort did. This is of course assuming Nintendo Land is sold as a separate retail game and not bundled with the console. But once again, there's so many wiimotes in circulation that bundling more really isn't necessary. I suppose it might be a good way for Nintendo to clear out any excess stock they might have... if they have a bunch of unsold wiimotes they need to get rid of? Sure, might as well toss them in. But I don't think they would want to manufacture more if its going to increase costs.