i really surprise that Kengo becOmes different...

maybe he will be the new IXA
or Nago will gain new Rider System??

Well in this case
I would Pick Nago since he got Kiva on his side and ummmm
if somehow he turn insane again HE IS GONNA REALLY PWN Kengo lol

but Kengo wasn't that bad,He got some good Kicking moves(Maybe he learned from
KickHopper lol)

Considering Nago's newfound friendship with Wataru, who knows, he might just end up as a whole new rider with a system like Kiva's. But if it came down to Nago and Kengo duking it out, when Nago's arm recovers of course, Nago would totally destroy Kengo. Nago is flat out PSYCHO when it comes to head-on things involving IXA. He even flat out tackled Otoya while the man was powered up, just to keep him from hitting that oen guy.