I recall reading that they would be releasing a new trailer "soon", but that was long ago, so it should be "very soon" now =P
My bet is on the 30th of June, right after the KF even starts.
It would make it exactly 2 months before the Game release, which would be a round number for whatever contract they made with their marketing partners and it would mark the departure of the hype train.
PS: Or if not, some other time.