[DreadBringer]

I still can't figure out this series theme, albeit a rumor is that its alternate name is Goths, which can mean it's something fashion and wonder if the other Riders would be based on fashion type or such.

Regarding the battle royale rumor, this can probably give some colorful characters and interaction if it's handled well, but can also likely had a lack of progression to be all about the Rider fights and interaction. I'd say Ryuki's outcome, albeit controversial, is something quite unpredictable, regarding "tournament" based stuffs.