This series is the second series that has 2 opening songs since Kamen Rider (Skyrider).
Before the broadcast of Kamen Rider Blade, there was a filmed scene which would have main character Kazuma Kenzaki meeting his predecessor, Takumi Inui/Kamen Rider Faiz. Takumi would pass the baton on to Kazuma, before the two transform together. This scene was only seen by several members of the production team and was never released anywhere else until pictures of said scene were leaked onto a magazine.
Kamen Rider Garren and Kamen Rider Chalice have been through a long-running debate by fans regarding their status as the Secondary Rider of Blade. Ultimately both Toei and Bandai confirm it to be Garren as revealed through further appearances in video games and merchandising which features Garren with the other Secondary Riders.
There is spin-off novel that takes place 300 years following the television series finale.