I am going to stick my kneck out on this one.....
I see Haye comming in a few pounds more this time as he grows slowly into the weight without effecting his speed. I think he will have more power than we have seen before closer to a 16 stone full blood heavy. (and still growing)
I see him not going sh*t or bust like he did as a kid again CarlT' but he will be looking to drop some massive bombs very early on and send a message around the world by blowing him away very early.
I know Ruiz has got a good chin but Tua caught him cold and I recon Haye will test his chin in the first 2/3 rounds.
If he does not get him out of there I think he will take a breather and settle down and try and grind him out in the mid late rounds. I agree with other post, if Ruiz is still there in the 10+ rounds he will be a threat down the homestraight.
However...... I go back to my early prediction he gets caught cold early in round 1/2 and gets smashed. I think a lot of people forget the moment when a tiny Roy J rattled Ruiz in the first round to the point where it put him off comming in close for the whole fight. Haye bangs a dam sight harder. Should be great fight !!