NOTE: ALL RUMORS FOR GOKAIGER WILL BE GOING TO THIS POST, UNLESS THE RUMOR/INFO IS SIGNIFICANT. I'LL UPDATE THIS BLURB TO INFORM YOU OF WHAT HAS BEEN ADDED-
These are rumors, so please take with grains of salt.
The Go-Kaiger, sharing the colors of the Goranger (Red, Blue, Yellow, Pink, Green)travel on the "Kyoudai Kaizokusen Queen Elizabeth Nisei" (The Giant Pirateship Queen Elizabeth the 2nd) to "All Sentai Worlds" as if the worlds were the 7 seas. The actors who perform the original characters have a "basis with the originals." In addition to fighting the enemy organizations of each world, the Gokaiger have their own villains to contend with; the "Uchuu Hakaisha Stronsoogu" (Space Destroyer Stronsorg)
RANGER COLORS ARE UP IN THE AIR AT THIS POINT. TAKE WITH GRAIN OF SALT.
Sakurada Doori , aka Kotaro/Kamen Rider New Den-O, is rumored to be GokaiRed:
I would love to see him as the red ranger- his portrayal of Kotaro shows a lot of red ranger tropes, and it'd be very interesting to see what he can do with it.
GokaiBlue (a female in this rumor) is rumored to be played by Fukunaga Marika.
Marika has had roles in dramas, movies, commercials and some specials.
GokaiGreen is rumored to be played by Noguchi Seigo, who is notable for playing R2 in Tomica Hero Rescue Force:
GokaiYellow is rumored to be played by Iriki Mari, whose done some tv, movies, and commercials:
GokaiBlack is rumored to be played by Yashiro Shingo, and if these rumors are true, he would be the oldest member of the cast. Could we be looking at a mentor type here, sort of like Asuka?:
Past rangers appear in this work. As with Decade, it is to be a mix of old actors returning and new actors dawning the suits. Gokaiger will involve the rangers traveling a dimensional sea, and ending up in the worlds of past Sentai.
Depending on how they go about it, these worlds may actually be back in time, and having the old actors, in some cases, may not make any sense, especially given the fact that a good deal of them are not able to return, for one reason or another.
That said, there has been mention of certain actors being tapped for roles in Gokaiger. We shall see how it all pans out.
The colors for the rangers are unknown, but most rumors point to the standard sentai color scheme (red, blue, yellow, green, pink).
-It is rumored that the Gokaiger's henshin device (and weapon) is a pirate sword.
-The Gokaiger's base will be a pirate ship. The pirate ship is rumored to be called the "GokaiGou". The pirate ship will transform into their 1st Robo.
-The villains will consist of the "Original Kaijin" that the older sentai fought against. It is unknown whether this means that there will be new monsters of old kaijin groups, only old monsters, or a mix of the two. It really depends on how they go about the different worlds thing.