Cool stuff! I am also interested in how the final control scheme and feel would be. I haven't played many games where one player controls two entities, but whenever it's an option it feels pretty half-baked. Not sure if this is how your project works, but I like the idea of controlling two characters at a time (one per stick input) and map their actions to a main button (L1 and R1 respectively) and maybe L2 R2 to handle a sort of auto-combo system. Something that would encourage never having to feel like you just move one character, put them down and then move the other one.
Good work :)