Yes, LEGO Rock Band is for real. And yes, this alleged E3 trailer is completely in French, which might lead one to believe that somewhere in the French PR system, a leak has sprung.
Totally pre-rendered stuff, our first look at LEGO Rock Band in motion via JeuxVideo is as disarming as we'd hoped. Minifigs cranking amplifiers all the way to 11 with their adorable plastic claws, pirates swaying with LEGO cutlasses and fake rockers fake rocking with plastic guitars is kind of adorable.
Accuse them of milking all you want, but LEGO Rock Band, coming to just about everything, looks like it has hit written all over it.