Last of original Godzilla series went out with a bang
I don’t know where they got this title from because there was never a Revenge of Mechagodzilla movie. This is actually 1975’s Terror of Mechagodzilla, which was the last film released in the original Godzilla series and saw the return of Ishiro Honda who’d done the 1954 Godzilla film return as director.<br /><br />The movie starts with a synopsis of Godzilla’s emergence and his transformation from a threat to the Earth to its savior when aliens started trying to invade. That leads to scenes from the previous movie Godzilla vs Mechagodzilla to re-introduce the latest aliens and their robot. This was all added for the American release.<br /><br />This time the aliens found an Earthling to help them out Dr. Shinji Mafune (Akihiko Hirata) who was discredited as a marine biologist and therefore held a grudge against society. He discovered an undersea dinosaur called Titanosaurus who will help Mechagodzilla take on Godzilla.<br /><br />The first half of the movie is all about Titanosaurus. Then Godzilla shows up to fight it and it’s not until the last third that Mechagodzilla finally emerges. In usual Toho fashion you’ve got guys in plastic suits smashing things and a bunch of tanks and planes trying to blow them up. For being the last of the initial Godzilla films it definitely went out with a bang.<br />C
The movie title "Revenge of Mechagodzilla," available on Prime Video, has received an average rating of 4.4 from 23 reviewers. 
It features elements such as IMDb 6.1, 1 h 28 min, 1975 and 13+, and it is priced at $None.

This title falls under the categories of Science Fiction, Kids, Exciting and Futuristic. 
The additional details include the following in key-value format :
 {"Content advisory": ["Violence", "alcohol use"], "Subtitles": ["None available"], "Directors": ["Ishiro Honda"], "Producers": ["Alois Brummer", "Henry G. Saperstein", "Tomoyuki Tanaka"], "Starring": ["Katsuhiko Sasaki", "Tomoko Ai", "Akihiko Hirata"]}

Here is a brief synopsis of the title : A mad scientist tries the to get revenge on the world for being laughed at for thinking that a dinosaur exists which does exists and teams up with the alien from the previous movie .Meanwhile the aliens rebuild mechagodzilla to destroy the world once more. So they team mechagodzilla and Titanosaurus toughened to destroy japan. So japan must depend on Godzilla to save japan and the world.