Wah... just watch the first episode, it seems not bad... but is he really going to

not yet... i announce when they release 
or u'll should search at tv-nihon fansub for yourself

tv-nihon normally about 5-6 days after RAW release they're gonna subs version... hope they release early this week.
better check torrent & ddl at tv-nihon

Please take the following with a grain of salt, even though these rumors appear to be more solid than most:

-Immediately before the collapse of Decade's World, the worlds of the original hesei riders become distorted

-The distortion leads the kaijin/monster of each world to become more powerful. Thus, Decade must travel to the other worlds to end the hostility between himself and the other riders, and cooperate, allowing him to regain the rider powers in each world, and stabilize them.

-Evil Riders seem to be unchanged by the effects of the distortion, and so, at the very least, their original voices will be heard. (This might explain why Kick Hopper and Punch Hopper show up in the next episode.)

-The Original Hesei Actors/Riders (unsure about Kuuga) will return in the Decade Movie, to fight alongside Decade, once he has righted the worlds and stopped the distortion. The riders are said to face a bigger crisis, again involving the collapse of the worlds...

-A new rider series will not start directly after Decade, but there will be one. Apparently, the 11th Hesei Rider appears in the movie alongside everyone else.