Tons of background, great chemistry, and 2 guys who can do other things in the meantime.

I don't need to see them fight every PPV for 12 months, but just some reminders throughout the year.

Let KO go feud for the IC title and at Summerslam when he is about to win it Zayn costs him, then they fight the next PPV.

Then let Zayn have a title shot and KO do the same thing. Some backgstage segments, times where they run into each other in tag matches etc...

Then you really ramp it up when they cost each other in the Rumble.

Knowing WWE though, they will just have them feud through SUmmerslam, fighting each other every PPV and move on.