This would be an incredible idea to lead to an eventual break-up of the Shield. I'm not saying they need to go their separate ways right now of course, it's still entertaining and interesting, but WWE would do well to have a 6 month plan from now to break them up before the stale really sets in.
The angle would be easy to work, there are SO many foils for the match participants, and the heels could go down swinging as individuals obviously looking great against the powerhouse Batista, the legend Hunter and the best worker 9 times out of 10 in the company right now in Orton.
Evolution would have to go over unfortunately but if you were looking at a 6-12 month time period for feud and payoff there's no reason that couldn't bleed into a Batista swansong, Hunter retirement and Orton back in the main event/at the top of the card which would be a good payoff for a past-it faction.
Unfortunately, whilst it makes a bit of sense and would be a hell of a match, I'm just not sure it'd have a chance to come to fruition. Given each individuals standing right now though never say never. 'Tista wants back eventually, Flair is about under a legends conract or whatever, Hunter can still go and Orton is floundering but still with potential. Good idea!