I think i'd best watch this weeks Raw then ASAP to get an understanding behind all this. Still though, I can't see them actually getting married, I reckon either AJ will say no, or someone will come down and stop it, as mentioned above.
Having AJ say no would be a bit daft really as I'm not sure what angle they could take from that, but if they had someone (anyone other than Punk) come down from and stop the wedding, they could then start a feud up. Just as long as it isn't identical as the one between Punk and Bryan it should be good.