While they might not be numbered as such to appear in the regular Masterpiece line, i'd wager the Movie Masterpiece Bumblebee (together with the rumoured Barricade and Optimus Prime) are developed by the same team that's responsible for the G1/Beast Wars MPs. I'd almost bet they're planning on releasing Bumblebee in July after the Beast Convoy redeco, and probably the other 2 in quick succession to capitalize on The Last Knight's release. If you count those, then we're looking at 5 new moulds for the year.

But I also think it's very likely this month's hobby magazines will reveal Dinobot in full for a release by the end of the year, making it 6. Since Delta Magnus last August, the longest we've gone without a regular release has been 2 months, and that's not counting MP14+ Alert as well as Loudpedal and Thrust in that period. Now that I think about it, it's kind of surprising there hasn't been any hint at more "+" releases, which makes me wonder if Alert didn't sell to expectations? That said, I think the line is the healthiest it's ever been, with more varied sizes and characters pulled from several eras.