Dragon Quest 10 was confirmed as a Wii release long ago, but Square-Enix confirmed at a weekend press conference that the game will finally be arriving in 2012, with a Wii U version to follow. The game will feature an MMO-style framework built around online play, according to Andriasang, and fans can expect a beta test prior to release.
The Wii U version will feature updated visuals though that and the preceding Wii release will otherwise be cross-platform compatible. Squeenix also confirmed that the game will feature some sort of Nintendo 3DS connectivity angle, possibly involving the sharing of character data via the handheld's StreetPass/SpotPass functions.
An FAQ was released shortly after the press conference, indicating that Dragon Quest 10 will carry a subscription fee. An online connection will also be required after the first few hours of story have been completed.
A now-removed trailer appeared briefly online, but you can get a glimpse of some gameplay footage from a capture of the press conference's Ustream livestream. Bonus points if you understand Japanese, at least for you, since you'll also be able to pick up on what's being talked about.