Actually, they have a theoretical chance as good as the Suns or the Pistons.
They have Ilgauskas, Varejo, Gooden that could slow down TD one-on-one to some extent and Ilgauska could draw TD out of the paint on offense with his shooting. If LBJ draws double team and Gibson and others get hot, they might have some chance.
However, Pop is really great at adjusting and he prepared the team for ALL possible matchups. Defensively, if the refs allow Bowen to maul over LBJ like he did Nash, Cavs have no chance at all. But a hypocrite Stern is, I don't think this will happen. So, if the rest of the Cavs can up their level of play a bit, with refs help, they'd have a chance.