[Gryphman]

I've had a theory for awhile, and I'm curious if anyone else has been thinking the same thing. I believe the second decade of Hesei Riders will end with a second Decade series, to finally end the Narutaki plot line. Narutaki has shown up in crossovers every year since Decade ended, yet we still know nothing about him. I can't imagine they would use him for this long for no reason. I think the Foundation X plot line might be part of it, too.

Another small thing that leads me to believe this is the case. When it was announced, Toei stated that W was the beginning of a new ten year project. Kind of an odd statement to make if you don't plan on doing something to cap it off at the end.