I haven't done BBQ comps, but I have done my fair share of chili comps. I've seen entries along those lines, both chicken as well as other non traditional chili entries. Assuming they were actually good to begin with, they will get rave reviews by some, but won't have the general, broad appeal across the chili spectrum.
At least that's been my experience, although ymmv and it might be significantly different at a BBQ comp.
Edited to say that I am sure yours is good, but I've seen everything from pasta salad chili, to chicken noodle soup chili, etc....