Take a look at the TFU photos, I particular Roller in vehicle mode. See the gun? 2 different size pegs. One's 3mm, One's 5mm. So that'd make Op and BB's hands 5mm and put them at about the same size as an old basic/pcc commander with the smaller toy more Legion sized.
Well, technically, Hasbro discontinued the name "Legend" when they changed it to Legion. Maybe they're creating some sub-scout, Cybverse Commander equivalent? I assumed they were legion, like you. Just returning the name Legends (Kinda like Legends of Cybertron)
Looking at the pictures again, they do look to be about the same as Cyb Commanders.
Bumblebee and blazemaster is a triple homage. There's also Hotshot, who played the Bumblebee "kid character" role for so long, in Bumblebee's stead. With so much of modern 'beel doubling back now on Hotshot. Hotshot's minicon, Jolt, was also a helicopter.
Hmm. Springer looked a lot taller in solo pictures. I suppose he's just skinny.
"I used to think it was a terrible thing that life was so unfair. Then I thought, 'what if life were fair, and all of the terrible things that happen to us came because we really deserved them?' Now I take great comfort in the general unfairness and hostility of the universe." — Marcus Cole, Babylon 5 — A Late Delivery from Avalon