Sounds exciting and no doubt will be successful. I like the concept of a kit as I think it would be a real blast to actually assemble the game (and those fussy guys can really finesse in the finer details) and tweak it to perfection and then play it. Man how cool to be able to say I built this myself.....well kind of.
I'm guessing the electronics will be assembled in the kit. If not I think this would be too daunting to most of us and probably give your support crew too many head aches.
Good luck with the project mate
And can't what for the title.......wow Metallica II or avengers II...... just messing with ya, I'm sure it will be something awesome and original