Following the Japan reveal, the Takara TOMY Transformers Masterpiece MPG-05 Trainbot Seizan rolls out for preorders in the USA. Look for this guy to begin shipping in Winter 2023 for about $155 USD from the following sponsor links:

This Transformers Masterpiece MPG-05 Trainbot Seizan gives new meaning to Optimus Prime's iconic "Transformers, roll out." In this case, this is where you start building great warrior Raiden! As seen on the Japanese series Transformers: The Headmasters, Seizan transforms from L Limited Express L485-300 series to Autobot hero and back again. Getsuei includes light sword, brain laser, cannons, rails, a character card, and instructions. Display MPG-05 in robot mode or shift it to train mode and display it on the included rail parts! Recommended for collectors ages 15 and up.