Completely hypothetical but its certainly possible that Bachmann will drop out before Iowa. Cain seems to me to be her logical choice to lend her support to at this point as their positions seem to mostly line up and they don't seem to go after each other.
If I'm right and she supports Cain, her birth state will almost certainly follow and possibly a national Cain nomination, IMHO.
This is the most amazing 6 minute summary of his whole campaign, including the health care confrontation with Bill Clinton, and a scathing critique of the lack of business experience in the current administration, but at about 4 1/2 to 5 minutes in the video, he talks about talking to people in the black community and the black church:
http://www.youtube.com/watch?v=aSNIOzf0duc
You may be on to something in regard to that part of the whole election, but the bottom line is that he is absolutely far and away the best person in the race at the moment.