Just a random thought, but I was actually imagining Dancing Jack and Elasti-Tron both have this begruding respect for one another.  Since Whatever kind of trickery Jack pulls Ryo has the smarts to possibly overcome.  So its sort of like old friends meeting up for a game of chess in the park, only with much bigger stuff and the occasional explosion.

Really with four heroes and four villains they should have some pairing off of who deals with who the most.  Like Captain Arashi and Equinox would obviously.