I was skimming through a biography of Mary Tudor the other day when I came across something I hadn't known. During the divorce saga between Henry and Katherine, one suggestion apparently originating with Pope Clement VII himself was that Henry simply marry Anne Boleyn.
Bigamy.
I can see some advantages to the parties. Henry gets to marry Anne, Mary is STILL his heir (thus not pissing off the emperor enough to take action) unless he has a son, England stays Catholic. Anyhow assume.... this crazy suggestion is implemented and Henry (presumably with Papal approval since it was Clement that suggested it) now has two wives. Results? Repercussions?