I think the early plan of Siren PatKaiser in default formation are using Splash and Magic as arms. But since Splash and Magic are mainly used in Siren LupinKaiser, probably if used in PatKaiser formation (black and silver legs), the formation name will be called as Siren PatKaiser Splash Magic.

Since Victory Striker also used by Patrangers in final episode, I also really want Victory Striker can combine with PatKaiser to form Victory PatKaiser. I think Victory PatKaiser will be have Crane and Biker as arms just like Siren PatKaiser.

In hacked VS Changer actually have lots of unused VS Vehicles:

- Black Dial Fighter (evil version of Red Dial Fighter)
- Boomerang Dial Fighter
- Chocolate Dial Fighter
- Halloween Dial Fighter
- Jewel Dial Fighter
- Trigger Machine Minus Ichigou (evil version of Trigger Machine Ichigou)
- Trigger Machine Laser
- Trigger Machine Blizzard
- Trigger Machine Rescue
- Trigger Machine 0-gou