[FairyKing]

Apologies if this has already been posted, but I just found out about these three prototype henshin belts Complete Selection Modification showed off at an expo. I doubt we'll see these exact designs in future Kamen Riders, but maybe a hint of what's to come!
Here's some videos from the expo:

They're mentioned on the Kamen Rider wiki's page for CSM too.

[DreamSword]

Those designs are definitely interesting if nothing else.