Two swinging couples? Interesting idea. Kinda trashy, obviously, but good for a little heel heat possibly (hey look all you morons, not only am I the World/Intercontinental Champion, but I/we get the choice of TWO hot women!). The only trouble is that Edge and Nitro next to each other would make it look like the WWE had just opened a cloning factory, and any chance Nitro had of getting over without the label of Edge II would be blown.
They could get a third to play the part of Christian/Mercury maybe call him Chris Pluto or something. They are 3 wild and crazy guys!