I don't understand your question.

How can Disney use something owned by Hasbro?

Do you think that a gobots movie could be in the works for the MCU?

HOW will this work?

Or was it a throw away line not to be taken seriously?

Throwaway line not meant to be taken seriously.

They're talking about how in the Guardians of the Galaxy Holiday special someone was cosplaying in as a Go-Bot which then Mantis says "Go-bots killed Drax's cousin" To answer your question idk if Go-Bots actually exist in the MCU, but Marvel probably got permission from hasbro to use them

Probably it isn't cannon more like an Easter Egg

It's similar to when Eternals made a joke about Superman or The Guardians of the Galaxy Holiday Special joked about Batman, doesn't mean it's cannon

However if Hasbro and Disney were to a crossover then it needs to be a proper Marvel Transformers crossover

Yes.

@Optimusprimebumblebee "Neo Astral-X" 123

It is canon that Batman and Superman exists as fictional characters in the MCU, just as there are Star Wars movies and other real-world stuff.

^That's not what canon means. They exist in the MCU as fictional media just like in the real world.

That's exactly what I said in my previous reply. It's canon that they exist within the MCU as fictional characters because it's mentioned in Eternals/TGotGHS, It is not really invalid to use the term "canon" here. Anyway, I meant that this is a different situation than GoBots since James Gunn says they are a real race in the MCU.