So far out of the 8 Kamen Riders we have seen, only four are left: Len, Kit, Chris and James. I knew that Brad was going to be vented eventually but I didn't think Drew would be. Now the question is, who's going to be vented next?
If you saw Ryuki, you might get an idea of how it will go down...however, I honestly think that all the "vented" riders will be freed from the void and join forces against Xaviax ala "Countdown to Destruction."
...and then we'll have a Dragon Knight movie featuring Kamen Rider Abyss and Kamen Rider Blue.