Lego Rock Band?

Just today, it was announced that Rock Band developer Harmonix, in conjunction with Warner Brothers Interactive Entertainment are currently developing a Lego version of Rock Band. The game is being made for PS3, XBox 360, Wii, and Nintendo DS, and some songs already confirmed for the game are Blur's "Song 2", "Kung Fu Fighting" and Europe's "The Final Countdown". The spokesperson stated that the game creates an enjoyable family experience - but does this seem totally silly and unnecessary to anyone else? One thing that is interesting, is that Harmonix is working with Warner Bros., as Warner Music Group was not too long ago engaged in a dispute with Rock Band regarding how much money should be payed for them to use Warner's catalog in the games.