So more or less you're just changing the motifs/themes?

Yes.

Hmm.

Personally I've been thinking of a redesign for Knight using a wolf instead of a bat.

OK.

Well, more specifically I was going with the idea of multiple contract monsters, like Ouja, Imperer, and Abyss; basically, 2nd Generation Advent decks and Riders. Knight would be contracted with a wolf and a bird of prey.

Not exactly what I had in mind. But OK. Spiffy.

(I'll take up on answering that question in just a moment.)

I like the idea of an OOO belt that uses the wizard fire water earth wind thing. Head body legs but with magic.

They kind of did that with OOO already...Red combo was fire, Blue combo was water, and the Grey combo was earth. Air wasn't really represented, but OOO had the elements already.

I know that Fourze already has Legendary rider switches, but how cool would it be if those were his actual modules and he got a switch for every single rider in existence? Something like:

Right Arm: Riderman's different arm attachments
Right Leg: Ichigo's rider kick
Left Arm: Ryuki's Dragvisor which in itself produces Ryuki based weapons for him to use.
Left Leg: Kickhopper's leg thingy that allows him to jump super high