He will probably last longer than Solis did.I see him getting a few rounds in if its Wlad he fights.If its Vitali he will be out of there in 3 but still do better than Solis.At least Haye will look like a pro fighter when the first bell goes.At that point he has already achieved more than the woeful Solis.
At least twice as long, and indeed here on ESB guys will say he lost by KO but won the event with the crowd booing him out of the stadium.
I think the fight will go on longer than Vit-Solis did, the 1st few rounds will be very cat & mouse. As for the event, it may be a non-event we'll have to wait & see. Wlad has the better EVT pedigree but has struggled in the later years of his career. Haye has an awful EVT record, has hasnt had an EVT win since Mormeck. Enzo, Barrett, Valuev & Harrison all had EVT wins against the Hayemaker so David will need to step his game up a notch IMO.
This is a question that needs deep analysis. Solis actually almost reached the 2nd round. I'm on the fence now.
The only reason that the big mouthed little bisexual will last longer is because the Klitschko brothers want to make her/him suffer.