If you loved Kamen Rider W Forever: A to Z/The Gaia Memories of Fate, try Kamen Rider x Kamen Rider Fourze & OOO Movie Wars Mega Max
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.

Kamen Rider W Forever: A to Z/The Gaia Memories of Fate

Kamen Rider x Kamen Rider Fourze & OOO Movie Wars Mega Max
What they share
Both films are directed by Koichi Sakamoto, and they both carry the playful, unhinged mood tags, and they sit in Action / Adventure / Science Fiction territory. If that's the register that drew you to Kamen Rider W Forever: A to Z/The Gaia Memories of Fate, the second film will land in a comparable space — through a different lens.
What Kamen Rider x Kamen Rider Fourze & OOO Movie Wars Mega Max is
You patrol a city under crossover assault when the oldest Riders crash the party. Forced into uneasy teams the heroes face an enemy only the first seven can unlock. The director folds five timelines into one spectacle. You stand in a superhero stadium of comic precision.