[Kiryu]

Thanks to HJU, The plot for the Kamen Rider Kiva and Blade novels have been revealed. While the Kiva novel is a retelling of the series with new elements, much like the Agito and Kabuto novels, the Blade novel is a continuation of the series and thus may contain spoilers for those that have yet to watch or finish Blade: 



The novel is set 300 years after the TV show, during his travels an amnesic Kenzaki finds himself on a prison island. There he may encounter Kamen Rider Chalice, making him the only still living character from the TV Show due to his status as an Undead

SOURCE:
Henshin Justice