This question has been settled with a final result: "Yes, in Q4 2020". Trading has finished.
According to Christoph Bergmann, Ethereum 2.0 will likely not go live in 2020, despite its strong position. He says the switch to a proof-of-stake-system is too complex and dangerous, so developers don't have the courage to go throught with this yet.[1] What do you think?
Sources:
1. "15 Prognosen zum Kryptomarkt im Jahr 2020", BitcoinBlog.de