Martinez go to Germany to take on Sturm something his predecessors failed to do, Or rematch Williams who looked bad last night but nonetheless holds a W over him
Both, in that order. He's not going to lose to Sturm, then he can rematch both Pavlik and Williams. That's a terrific MW title run, even if he retires after those three.
The problem with a Sturm fight is Sturm. He isn't going to fight anyone who matters as long as he can make decent money fighting mandatories.