I think a German pope will instill a moral compass in that country like it did in Poland and get another big piece of europe steered away from relativistic, nihilistic leftist sop it has been stuck with for a long time.
IMO, I wouldn't be surprised if that was a consideration in his nomination.
What is Christianity's greatest enemy right now? Islam? No, the president has been handling that problem. Communism? A concern especially in China but the Soviets fell and so can they. The internet playing a major role. The alliance between Australia, Taiwan, japan and the U.S. playing another.
The greatest threat, imo, to Christianity is the secular humanism that has embraced Europe. The Culture of Death. No better place to confront it than in the heart of Germany.