Because Megatron is a commercial performance, if you mention Bingdundun for commercial purposes, it will be an infringement.

Copyright protects the image, while trademark protects the name. Moreover, the use of the trademark owner’s trademark by a third party to refer to the trademark owner’s own products does not constitute infringement. So the reason that cannot be said is that Bingdundun did not give advertising money to Universal Studios. The staff of Universal Studios should avoid promoting Bingdundun for free.