Maybe I’m being cynical, but I figured they realized they have all the parts already - VT-1 body, fighter arms, and Gerwalk arms and legs - so all they needed for this kit is the artwork and figures. They can create a new model from a key part of the movie with minimal investment in new tooling. I pre-ordered one primarily because of the figures.
On my long list of diorama ideas (most of which I’ll probably never get to) is a flight line scene on Earth with a small crowd of pilots and ground crew gathered around a shiny new VT-1 (in fighter mode without FAST packs), sitting beside two older VF-1Ds. I want to depict the arrival of the new trainer variant alongside the old version.