hmmm... Well big Dave could turn heel and feud with Rey or Flair. There's a heel spot open for him now that Kennedy's goine.
If he stays face, he has the feud with Henry that's bound to happen eventually, once they're ready to job henry, he could go back to feuding with Finlay for a little while, Khali, MVP...
But looking at it, it's fairly obvious he's going to turn heel, they just moved two of their main heels off the roster.
As for Edge, he has Flair, Rey, Khali, and Hardy at the very least to go through before facing Kennedy at Wrestlemania.