I sure as hell hope not. Though Ryce did notice how we've had 2 character reveals at E3 whenever Smash had characters to reveal, so I suppose it's possible that "Brave" & whoever is after them could be saved for E3.Probably gonna have to wait till E3.
My guess. Joker was always going to take a while to release. But I feel the 2nd will release super close to announcement. (This is all base off smash 4 DLC so I could be very wrong)