The lady that replaces Medusa was talking about a member of the Church destroying their manufactured servants, that was def teasing of Lancer's master that will replace Karen in the story. The priest that send Tsukumo to the war replaces Ciel in the original story, Ciel also send Akiha to the HGW there and should appear again later
Fake Fuhrer's face was never shown in the original manga, he was always kept as an eyesless mob, so I wonder what will they do here
If the story keeps with the general layout of the original, then next chapter or the one after that, Tsukumo should