Aspyr Media have confirmed that the Linux version of Civilization VI will not be confirmed for this year, as they are still looking into the 'feasibility' of the Linux port.
This dashes my own personal hope of some kind of confirmation at least before the year is up.
It's good that they're keeping us informed and I have to hand it to them for repeatedly talking about it. Too many other developers fall silent, but it's clear it's still firmly in their minds to keep mentioning it.
Hopefully it will be a surprise release early next year, but I don't want to get your hopes up so don't hold out for it.