I thought my idea about an Undisputed Championship would get people talking. Personally, I doubt it will happen. It would cause problems for booking TV (Champ would have to appear on all three brands, if he didn't, then the show would seem weak/lacking). It would also cause problems at house shows, as the Champ obviously wouldn't wrestle at every house show (like currently), so fans will be left dissappointed.
It is interesting to see that WWE are booking the EC for a PPV such as urvivor Series. This PPV is one of the 'Big Four' and its name recognition sells the PPV alone. Obviously this match will boost ratings, but it could have been used to boost another PPV, such as a Judgment Day or No Mercy, etc.
It is obviously too soon to speculate on who will be involved in the match, but there are two options; tri-branded or single branded. I would like to see the EC being tri-branded this year, but have only one title on the line. This way, a title change would be able to shake up the ME scene on a brand, as the new Champ would obviously be traded over to that brand.
e.g.
World Title:
Undertaker vs Batista vs HBK vs Edge vs Lashley vs Umaga
HBK could win the World Title and then get traded over to SD!, where he would then feud with Undertaker.