So, who's gonna be the heel?

[Flock of Moosen]

The following is a semi-spoiler for next week's Smackdown (not this Thursday).
From the sounds of it, one of these two is most likely going to be turning heel. Which one though is anyone's guess.

There has been a change in a confirmed match for next week’s SmackDown in Kelowna, B.C. During the Brock Lesnar vs. Vince McMahon cage match main event, they have changed the special guest referee from Sable and Stephanie McMahon to Kurt Angle. It looks as if a new angle is in the works.

So, which one do you think it will be? My gut reaction is it would have to be Angle since he's the ref but you never know with the WWE.
That will suck though if it is because I've really been digging Angle as a face lately.