Let me set this up:
In order for the fans to call the plays, each fan would have to pass a test or have some other credentials. Perhaps we could start with a 3rd grade math test or you attended one of Ron Prince's camps for moms.
Then, all qualified fans would get a voting button. Winters and ThatGuy would send out 3 plays to choose from for each down and all voters would have 5 seconds to vote. Then the play with the highest number of votes would be the play for that down. No audibles.
Really, that is pretty simple. I would go for that.
Gonna win 'em all!