Who will it be? If Haye is going to wait until April/May to fight, then hopefully it's Chagaev or Wlad. But let's not hold our breath...
No, Pac will be tied up in the Super 6 tourney when he replaces the next dropout... I think somehow it will be old Rahman (softest guy on the WBA list now).
Hasim Rahman. Said why here in a thread I started: http://www.eastsideboxing.com/forum/showthread.php?p=8201213#post8201213
Rahman is an interesting choice. Mormeck is a potentially easier and higher grossing fight though (IF Mormeck gets past Ibragimov). But fighting Rahman would allow Haye to keep working on fighting a tall guy.