Korean Air could come to Berlin, as they have to give up slots at FRA as part of the Asiana Airlines takeover.
Sadly, I did not found an English source jet, but here is a German source and it is possible to translate it with Google Translate or DeepL:
https://www.aerotelegraph.com/korean...in-in-aussicht
Here is a translated quote of that source:
"And then, of course, we have to look at other connections from Germany" says Kwak. Munich and Berlin are possible options. However, the company withdrew from Munich because Lufthansa was simply too strong there. Berlin is also interesting, he said, because more Koreans live there than in Munich.