Studio Trigger has a bunch of Transformers fans and even a history with the franchise. Check out the TF Wiki page.
All they missed was the US comics. Shame, but they are Japanese…not that I recognize any manga references. After a rewatch I also noticed they missed the Rescue Bots, but I don’t know if those shows appeared in Japan, while the Aligned Continuity seemed to only be represented with their version of the Vehicons because Beast Machines is also absent. What else did you spot?
BW Media Spotlight 