Megaranger Tribute Episode. The Gokaiger disugise themselves as high school students and enter Moroboshi High. Guest Starring Ooshiba Hayato as Date Kenta/MegaRed
Timeranger Tribute Episode. Gai episode. Guest Starring Izumi Shuuhei as Domon
Aihm's backstory episode. The Emperor's bodyguards, who destroyed Planet Famille, appear.
Here's the big one. Gokaiger's winter movie will be called "Kaizoku Sentai Gokaiger VS Gavan".
Rumored to guest star Ohba Kenji as Ichijouji Retsu/Gavan, Akebono Shiro/Battle Kenya and Oume Daigorou/DenjiBlue.
A Metal Hero team-up??? Sounds interesting if it turns out to be true. Seeing as Kenji Ohba returned for the Gokaiger: 199 Heroes movie, I could see this happening somehow. But only time will tell.
The past couple of rumors I posted left some of you leaving with comments such as "I don't believe it" or "IDK it didn't happen when the actual episode aired." THESE ARE JUST RUMORS. They are not true until it is confirmed through actual episode descriptions or pictures.