Just Dance 4 has been confirmed to NOT require a Wii Remote. You can use the Wii Remote or the Wii U GamePad. So far the only use for the Wii Remote has been as an optional controller or for multiplayer. I wouldn't expect a Wii Remote to ever be bundled unless there is a game you literally can not play without one. Right now, every Wii U game announced can be played without needing a Wii Remote.
The problem with that reasoning is that it's only factoring games developed prior to launch. No game currently requiring it hardly indicates any less likelihood of its standardization-- simply that the final package was still being determined during game development and there was always a
possibility they might have to leave it out it. But as I've already repeatedly pointed out, Nintendo clearly has intentions for uses that would require it, therefore there's a high probability one will be included just to keep it standardized.
That's not to say it's 100% certain they will pack one-in every/any box. After all, it
is pretty safe to assume that virtually all 3rd-party developers will focus on GamePad-based controls automatically anyway, so games requiring the Remote would mostly be published by Nintendo themselves who certainly aren't above packaging a Wii Remote Plus with each game that would need it. But at the same time, when factoring other things like eShop distribution, games that would also require the Nunchuk (which would be expensive to bundle with a game
and Remote), and keeping 3rd-parties' options open, it makes a lot of sense to expect they'd make the extra effort to include one standard. So, the assumption that it's not needed is far from safe, that's my point. But only time will tell for sure.