The shism happened between the Latin and the Greek parts of the then still at least theoretically universal church. Menaing, the difference was already in place before the offical start of the schisma. And Germany was as fixed inside the Latin Church as its even possible. After all, it is the directed descendant of the Frankish Realm, THE state of the Latin Church, and furthermore, its the HRE, whose entire state conception is linked with the Latin Church.
So, nom the split itself is not possible. Weird reformationa nd Russian conquest, maybe, but the former I cant see and in the case of th elatter there wouldnt be an own patriarchate...