[Matrixbeast]

I was thinking of a Kamen Rider Fighting game, 1v1. It would be a 6 button fighter, but a simplified system. 4 attack buttons (Light, medium, heavy, and special), with 2 additional buttons for transformations and such.

And the transformations would be the key gimmick. When you select your character, you also pick what forms you want. For example, if you selected Kuuga, you would then select which one of his 3 forms you want (Titan, Dragon, Pegasus. You'll automatically get the corresponding rising form) and then which Final Form you want (Ultimate or Rising Ultimate).
I was thinking something similar to how MKX did their system, in that your forms and supers change things up. However, for the forms, you can freely swap (So, for example, if you selected Titan, then you can freely swap between Mighty and Titan forms (Though with a small cooldown to prevent spamming or some kind of strange combo loop or whatever), while final forms would have a timer on them.

Where the craziness comes in is for the later riders. For example, if you select OOO, you would have by default Taka, Tora, and Batta. Then you can select 3 more medals, one for each slot. So the player would have the free choice to select a full combo, or just 3 random medals that they feel would work well for them (Though Combos would provide their special bonus powers like in the show).

For characters with multiple powers going at once, I would pick one specific piece to alter their gameplay, while the others would provide bonuses or stat changes (Example: Shotaro's side in Double would alter gameplay, while Philip's side would provide numerous stat and ability changes). Additionally, the form change button would have a corresponding direction to change the specific pieces. Such as back, down, or forward+Form change for OOO's medals. The only one I haven't figured out is Fourze's switches )

For variety's sake, I was also thinking that, so characters like Ryuki, Hibiki, and Kabuto actually have options, they could get something like Summon Dragredder or attach all his vents (Sword, Strike, Shield), Kurenai or...Something (I dunno ), and Put On or Clock Up (Kabuto's special moves and supers would make use of Clock Up, but this form change would allow him to just straight up use Clock Up. Unlike other form changes, though, this operates with a timer. So while he can turn it on or off at will, while it's active, the timer is counting down. It recharges while he's not using it, but it recharges slowly since the ability to slow time down in a fighting game is stupid good)

Anyway, yeah, I'm just rambling because I have Kamen Rider and fighting games on the mind