The first track from the new album 'This Is All Yours' is starts with a solitary keyboard with a Wild Beasts feel to it, but soon develops into something more recognisably Alt-J. The usual percussive flourishes appear, along with what sounds like a clarinet and some sampled brass. It's not a radical departure, more an evolution, but one which tees up the new album nicely.
PS apparently that's Miley Cyrus you can hear as the sampled female voice. I bet none of you saw that coming!