Either that or just there for a monologue perhaps. If they cant get Odagiri back I would not mind if they go with reviving Riku. Suit actor for Kuuga is still around who also played the role of Riku during flashbacks.

I'm pretty sure that's the villain there.

Who hopes to see Geiz+Ora?

So after Gaim which tribute will be next? Probably Decade since Zi-O will definitely use that to pair up with Build Genius in HG Forever.

Although Agito, Kiva and Blade's Ridewatches have been released so there's that too

Set images have shown Shun Nishime on-location as Takeru, alongside the suits for Agito and Hibiki (both wearing the DecaDriver), and Kamen Rider Zi-O Ghost Armour - so it's a dual Ghost/Decade arc, I'd say, like Fourze/Faiz.

Considering how we didn't see an Another Decade or the Decade Armor, I think it's more likely going to be a Ghost arc, featuring Decade, that leads into the actual Decade arc.

That would make sense, especially since there's a rumor that Decade will mentor Zi-O or something so he might have an extra presence compared to other Legend Riders.

I'm thinking Decade as well. With Gaim, Zi-O and Geiz will have all the main Ridewatches of Heisei Phase 2 with the single exception of W -- whose ridewatch it seems pretty likely they'll get in Heisei Generations Forever.
They cycled through these pretty damn fast.

I'm curious if Inoue will actually appear in the show or if he'll just be doing voice over work while the Decade suit is all that we see.

Of all the actors, I'd say Decade's is the most likely to come back unless he's busy with other projects. He's come back in a lot of KR-related stuff and he's really into the franchise.