The outcross sounds pretty amazing. What would be the outcome?You could always replace your male with a Black or Blue roo, too.
Your first gen would only produce Black or Blue offspring, with the males being split to Choc.
Breed one of these males back to his Chocolate mother and you'd be well on your way to hatching another visibly Chocolate rooster.
You'd probably also be improving type by outcrossing to a nice BBS line.