Wach is the best out of those available and willing to fight. Everybody else is either tied up in other fights or coming off injuries. Plus he makes the most sense economically with the Polish TV money.

Adamek is fighting Walker
Pulev is fighting Ustinov
Povetkin is fighting Rahman
Solis is being sued by Don King
Helenius is coming off a career threatening shoulder injury
Mitchell not ready
Arreola's camp is waiting on Vitali to retire so he can fight for a "vacant" WBC belt
Chagaev been there done that
Boytsov is coming off multiple hand operations...still treading water
Stiverne is ranked very high by the WBC and will likely face Arreola sometime soon
Fury & Price not ready this year

Can anybody honestly pick a better fight for Wladimir?