How have I never heard of this before now?! ??? This is one of those movies I wish had been made. Just the image of Batman climbing up Godzilla's back with the aid of the Batrope would have made the entire movie worthwhile.
When I saw the title of that video, I assumed the plot would involve a scene where Batman becomes gigantic to fight Godzilla. There was a scene like that in Jiro Kuwata's Batmanga #46, where Clayface transformed into a dinosaur and so Batman changed himself into a sort of giant batarang in order to subdue him.
(https://i.postimg.cc/pVsZbhG9/batmanga.png)
I could see something like that happening in Dozier's film.
I wonder if there's any way a Batman/Godzilla crossover could be done now. Perhaps as a Batman '66 Meets Godzilla comic book. Alternatively, they could make an animated film in which Diedrich Bader's Brave and the Bold Batman meets Godzilla. That would make a great sequel to the 2018 BTBATB Scooby-Doo crossover movie.