Kamen Rider Zi-O will use 24 different clock faces to represent 24 hours needed to access the Rider's timeline to use their powers. The Kamen Riders and the hour they represent in Zi-O's clock are:
01am - Kuuga
02am - Agito
03am - Ryuki
04am - Faiz
05am - Blade
06am - Hibiki
07am - Kabuto
08am - Den-O
09am - Kiva
10am - Decade
11am - Rider #1
12am - V3
01pm - W
02pm - OOO
03pm - Fourze
04pm - Wizard
05pm - Gaim
06pm - Drive
07pm - Ghost
08pm - Ex-Aid
09pm - Build
10pm - Zi-O
11pm - BLACK
12pm - BLACK RX
Take note, the only concrete info we have about the new Kamen Rider is that he is the 20th Heisei Kamen Rider and that this new Kamen Rider will transcend space and time.
[Source: SpecialForm12]