>>78563871It's Kamen Rider Drive's spring movie from earlier this year, Superhero Taisen GP: Kamen Rider 3. Shocker creates a cosmic retcon machine allowing them to send back one of their modern cyborgs to kill Rider 1 and 2 immediately after they defeated Great Leader in the 1971 series finale, and sends the entire world to shit. Drive has to team up with the other surviving Riders in the modern day and win the Kamen Rider equivalent of Whacky Races to save the day.
It's a fucking awful movie, but Rider 3 himself is a pretty cool character. The real shame is that the movie starts out kinda decent and then shits itself halfway through, once the cast get where they need to go and the whacky races start.
Also of note is Rider 3 is actually based loosely on an old abandoned Ishinomori design for the third Kamen Rider, which was ultimately scrapped for V3.