As I've said before, Toei might not be willing to pay whatever the originals wanted to return. And that's even going into the idea that they want to come back. Just because one loves Kamen Rider doesn't mean you come back and work for free.
But it's not like the old Riders are going to be in every single episode; probably a four episode run at best, and maybe a team-up toward the finale. Plenty of these guys have put in guest appearances in other tokusatsu (hell, there was a period where you couldn't find a tokusatsu without an appearance by Ryouhei), and a few of these guys remain friends with directors, writers, and/or producers and sometimes will work as a favor. Like, Takamasa Suga supposedly stayed close to Ryuki's main director Ryuta Tasaki (who's Decade's main director), which is how he ended up appearing in Sh15uya (which Tasaki directed).
It's just another boneheaded move on Toei's part. I don't subscribe to the whole "it's just a toy commercial, story's icing on the cake." EVERY show is meant to sell product, but a lot of writers and directors on these shows are still dedicated to delivering quality work. Besides, it's a boneheaded move in terms of marketing. Rider DVDs are still on shelves -- what better way to stir up interest than expose a lot of these characters to viewers who missed them the first time around? Now people who didn't see the Kuuga series won't bother to check it out since it has nothing to do with what they might see and like in Decade.
I doubt budget is the issue. They get previous Rider actors on shows all the time, for a two parter. This isn't much different, just that they are reprising their own role. Pretty sure most actors will feel somewhat nostalgic about getting a chance to play those characters again.It could be:
-The actor doesn't want to return
-Toei doesn't want to pay them
-The writers don't want to go through the headache of making this fit in continuity (hence why Ichijo from Kuuga has been replaced with a completely different character.)
-The actor wants to return, but neither Toei nor the actor can figure out how to fit it within their schedule.
They apparently have confirmed Kento Handa (Faiz) is returning, so this indicates that either A) Toei tried to get Handa back or B) Handa knew someone connected to production. If A is the case, then I'd assume Toei tried to get every actor back, and negotiations fell through. At which point, part of the ire should be directed at the actor themselves.
Forever Knight said:Hopefully Toei can do this as good as Mebius did with it's Ultraman cameos then we are in for something special.