I like Peter, but Foreman would knock him out. I don't think Peter's chin is quite as shaky as the McCline fight would indicate, or quite as sturdy as the Klitschko fight made it seem. This fight probably turns out a bit like Foreman-Lyle, with each guy scoring a KD, before Foreman's overall superiority permits him to prevail, somewhere around the 4th or 5th round.
Peter would get dominated in this fight, but so would Wlad. I would probably lay money down that Peter would last longer than Wlad in the ring with a young Foreman, Wlads chin might take him to the 2nd round at best.