Just like to point out that BW MPs are obviously not scaled to G1 MPs. If it were, then MP Beast Convoy would be tiny. Here's a human skeleton next to a gorilla skeleton - as you can see, even when standing fully upright, humans are still taller. Of course, gorillas don't stand upright (humans are the only primates who have a fully erect gait), so the a scale Optimus Primal's head would be somewhere between the heights of the Spike and Daniel figurines included w/ MP Ultra Magnus. This is in beast mode, so in robot mode it'd be maybe a head taller than Spike. Even going by cartoon scale, Optimus Primal would only be about as tall as MP Spike in Exo Suit in robot mode.

I suspect that they're sticking with the same size as the original Ultra Class toy for this. Although Dinobot was taller than Primal in the show, because in the cartoon Optimus Primal was really reduced to the size of a Mega (Voyager) and Dinobot was bumped up to an Ultra size. So if MP Beast Convoy is going to be Ultra size then I wonder if a potential future Dinobot would be Leader size.