Honestly the Shield idea makes sense.
She is known as the "anti-Diva". She wants to "change the way the diva division and the people are run", So why not use that as her gimmick.
Let AJ win the title at WM with Ziggler assisting (nice heel win) Also Big E is ringside, While they are celebrating, the music hits.
Paige comes out with huge fireworks going off in rapid succession, Staring at AJ, and doing her CROW scream.
The shield then comes out of nowhere (or the lights go out), and ATTACK Ziggler and Big E, while AJ is going nuts.
Paige then storms from the top of the stage and enters the ring, pounds on AJ and does the Paige Turner.
The shield stand there while Paige grabs the mic and says.
"This diva's division is pathetic, and it's time for a change. AJ Lee and the rest of the barbies in the locker room, It's time to #beliveintheshield" Throws the mic down. Music hits.
That would give her a huge presence already, and she can then feud with AJ lee for the next 3 months, while taking out other diva's in the lock room one at a time, Until AJ is left.
This would then start a feud also with Ziggler + big E vs two of the shield members, and have the other (reigns) have a separate feud with Ryback.
3 Separate feuds, all putting eachother over.