The Gobots have never appeared in the Transformers cartoon or Hasbro's toyline. As others have mentioned, this is actually a return of Bandai's Machine Robo rather than Gobots... so calling them Gobots is kiiinda misleading (akin referring to Macross or Diaclone as 'Transformers').
Also, even if Hasbro does own the rights for the Gobots designs, it still wouldn't affect what Bandai does with it for Machine Robo in Japan. I think it's similar to how Harmony Gold owns the rights for the Robotech designs in the USA, but Big West still holds the rights to continue making Macross in Japan. Cos knowing what HG are like with jealously hoarding and squatting on their IP, there'd be no way that they would've allowed Studio Nue/Big West to do anything w/ Macross if they had the chance!Thankfully this hasn't been the case, and Nue/Big West have continued to make numerous Macross series since the original.
Video links for comparison:
Challenge of the Gobots intro
Original Machine Robo (Revenge of Chronos) Opening
Gobots toy commercial
Machine Robo toy advert
...although I'd really love to see the Australian version of the Gobots commercial which called the toys "Machine Men" instead.![]()