Here are some possibles "fusions" XD
Kamen Rider Mk. II ^^
Kamen Rider Zeta, with Emma Sheen as his sidekick ^^
Just when I thought Hibiki's design is weird enough...
I think, maybe it's better to leave the two different sci-fi series separated as they are right now ^^; I still prefer cross-over of cute girls into MS designs though XD