I didn't know enough about #KamenRider to get all the references in this movie, but it was a good introduction to a bunch of characters at once so I can check my favorites later.

https://www.youtube.com/watch?v=3hXyZp0kDvo

Showa Rider Vs Heisei Rider Kamen Rider War feat Super Sentai Trailer

YouTube

Heisei Riders have the best costumes, but most of them seem to have annoying personalities imo.

X and 555 were my favorites in the movie, so I'll check their series next.