After the confirmation for the upcoming 40th Kamen Rider Anniversary movie presentation, entitled OOO - Den-O - All Riders: Let's Go Kamen Rider, what's the next we will hear? Of course, it's rumors regarding the movie.

Please do take rumors with a grain of salt.

• Hiroshi Fujioka shows up.
• Yummies and Imagin appear in the previous Kamen Rider's timelines.
• Kamen Rider Den-O chases after the Imagins and ends up at Kamen Rider OOO's time. Together they travel through time.

And as a bonus, here are new rumors for Kamen Rider OOO:

• Akira Date, Kamen Rider Birth's user, offers to trade a red Core Medal for 500 Cell Medals.
• The kendo girl, in Episode 17: The Kendo Girl, Oden, and the Splitting Yummy, has two desires which causes the 2 Yummies.
• There are side effects from using the dinosaur Core Medals, which can lead to death.
• Giru, the Dinosaur Greeed, creates a Yummy from Maki, the world is about the end and Eiji says he wants to rescue everyone and the dinosaur medals react to that.

Source: Kamen Rider Rumors