[luigicesare]

I'm hinting more toward Sagara. It's clear that Ryoma would confront Baron/Kaito (before his transformation to Lord Baron), so his fate is very unlikely, maybe he who convince Kaito to eat Premature Lockseed (or else) to become Lord Baron and then Lord Baron proceed to kill Ryoma. The one and only candidate for Jam is Sagara, maybe after Gaim and Baron fight, Gaim victorious (obviously, killing Kaito in process) and receive KnK as his prize and then revive the fallen rider (At least Takatora, Micchy? see the leaked image of regular Ryugen costume used?, Kaito. Also Yuuya etc) to confront the "Forest Helheim" it self, in order to stop Helheim's Dangerous Cycle (venture to inter dimensional world to force it's race evolution). And then we'll have this big fight between the Four main Rider vs Sagara/Jam.