No, not now, do it some time next year if The Shield are still together. The Wyatt Family would probably turn face for this feud though.
No way the Wyatts would ever turn face, especially not for this feud. It wouldn't take much for The Shield to go baby face since a lot of people don't even boo them anyway, and it's much easier to cheer a group of renegade baby faces than it is a few twisted backwoods freaks like the Wyatts.
I think I typed up this dream segment before but I'll do it again because I would mark at the sight of it:
There's a segment I'd love to happen between The Shield and the Wyatt Family and that's the latter getting the better of the former by using their cleverness and cunning ways to defeat the brute force of The Shield. (Brains > Brawn.) The Shield are giving a promo and then suddenly the lights go out and when they come back on, Roman Reigns is already lying face first on the mat unconscious. Rowan and Harper then out brawl Ambrose and Rollins and perhaps do a little more damage on a recovering Roman Reigns as well. Wyatt then comes in and puts his own finishing touches on The Shield members and says his piece and that's it.
Wyatt sitting back in his chair and watching his two guys dismantle all three Shield members by outsmarting them really displays the difference in attack between the two groups - The Shield are more about outnumbering you and putting you down with brute force, and the Wyatts are a little more about being ingenious in their attacks (i.e using the dark to their advantage, going after the biggest guy first, the usual sneak attack from behind etc.) Plus, someone interrupting and putting The Shield down for a change feels a lot like karma to me.
If The Shield really are being slowly built towards a face turn (I'm not convinced but pretend they are), then Rowan and Harper could even be the guys to win the tag team straps from Rollins and Reigns.