is Duane Swierczynski DC exclusive? As far as I know, he's only writing Birds of Prey for them (which is actually quite lovely, easily one of the better reboots), so I'd like to think he's free to bop on over to Marvel and write Cable again. Quite frankly, I never really cared for the character of Cable, but Mike Carey started to turn the tide on that opinion and Duane completely reversed it. Cable's last solo series was so good that I even gave Jeph Loeb the benefit of the doubt and picked up X-Sanction (which was actually fairly entertaining, IMO)!
I'll be very curious to see what role he plays in AvX and beyond...though him having an eye patch and bionic arm may come off as Marvel just trying to tough up a tough guy even more, we'll see!