After Ouja appearing in Kamen Rider Brave's Spin-Off next Past Rider to revive is Kamen Rider Duke → Ryoma Sengoku. He will be revived as a Ghost and will fight the Ghost Riders.
TEAM BARON / Dance with Me (Short version) (Theme Song of Gaim Gaiden: Kamen Rider Duke / Kamen Rider Knuckle)
A very different Lock Seed was seen with Sid in the Making of Gaim Gaiden: Kamen Rider Duke / Kamen Rider Knuckle. Could this be the Zakuro Lock Seed?