I assume you mean after the Maximals lost the Beast Wars (not BM) they went underground...

The whole idea that it was Cybertron's (Primus') will for the Maximals to bring back the organic to Cybertron, I always found stupider than something very stupid.

I always saw it the other way around. The Maximals weren't to bring back the organic, but (by accident or intention) bring back Transmetal technology, which is no doubt where TransTech moves on from, technologically speaking.

And from what I understand of yours, you're thinking something similar.

Megatron would be testing Transmetal technology (we saw him do it in Feral Scream) and adapting it to more vehicular forms rather than Beast forms.