I've long wanted Vixen to be a regular with the Birds of Prey and if they reboot the team, that would be an awesome place to start (as long as they get a new writer and regular artist.)
I would love for her to be in the Justice League, but so far the League hasn't been that good to her, so perhaps, BoP would be a better fit. Black Canary, Batgirl, Vixen, Katana...I could really enjoy that book!