It's unlikely... But something similar to Fury II or the Dimitrenko and Ustinov fights isn't impossible. Chisora looks like he's lost a step or two as well. Easy UD for Pulev.
Chisora has shown up in good shape I think Chisora could apply too much pressure and outwork Pulev to earn a decison. I don't think Pulev is mobile enough or has enough power to keep Chisora off him. As long as Chisora stays busy he has a good chance.