Not really. I kinda dislike this whole GM thing to begin with, but there's always some special power. Like Linda gave Stone Cold some power back when Vince joined the CMOD, and when Shawn got some other higher power. I forgot the names they were given, but it was power, much like the GM position is. If they do decide to add one though, the only few I would want are Ric Flair, Mick Foley, Iron Shiek(yes I know it's very unlikely), or a heel HHH.
Ric Flair because he's great on the mic. He's energetic and can still sell hits and we are used to him in a suit, so why not have him as a GM. Mick Foley because he's a good babyface. He can take plenty of bumps and is loved by the crowd and has good mic skills. Iron Sheik because he is golden on the mic. Yes Sheik is very very very unlikely, but I would mark so hard if he starts making wrestlers humble. A heel HHH because look at his time in Evolution, and in the Helmsey/McMahon era. He was a tremendous, who ruled with an iron fist. I believe he could rule even harder if he gained control of Raw and can make it very very entertaining. I can see him in a massive feud with Cena, and I think they can make it great, since HHH is a hard head and could possibly make a young heel star go over Cena.
Of course I still wouldn't mind if they got rid of it altogether. It seems annoying to have the General Manager gimmick and whatnot.