Wouldnt quite go that far myself mate! Best I could say is Manny would rather Haye ended Wlad's reign than someone like Peter or Chambers but even that might be a bit of a stretch
Thread title is a little misleading. Steward said (probably in response to a question asking if he would ever consider training Haye): "I would work with David.". That's not quite the same thing as "I want to train David Haye.", which I didn't read anywhere in the post.
Steward is a great teacher and reinforcer of the boxing basics. Not sure his methods would appeal to David Haye. In any case if Haye loses I think he'll hang the gloves up.