The WWE has been hinting at a D-X return. Starting at WM22, Shawn Michaels did the D-X "crotch chop" before he dived off the ladder onto Vince McMahon. That same night, Triple H gave John Cena the D-X crotch chop. Over the last month or so, both Michaels and Hunter have been taking a lot of liberties with the "crotch chop." I've also been reading online that in the next month or so, at the next RAW PPV, D-X will indeed be making their return.
I also read that the WWE has been trying to get the New Age Outlaws to sign a new contract with WWE, but they're currently under contract with TNA. I'm sure if Vince wants them bad enough, and is willing to pay the price, he could get them.