Here's an idea:
The WWE make an annual PPV named like, "Clash of Champions" or something where they had the following matches:
WWE Champion vs World Champion
IC Champion vs US Champion
WWE Tag vs World Tag
Woman's Champ vs "X"
Hardcore Champ vs "X"
Cruiserweight Champ vs "X"
"X" = Over the prior weeks, they can hold a tournament to see who will earn the right to represent their show against the other's champion.
I think it would be great to have a crossover event like this to bring the two shows together for a night. The show with the most wins could have bragging rights, or even a special title to show off until the next year.
What do you think? Ideas? Suggestions?