Direct answer: The official Version 2.2 livestream was scheduled for October 7 at 11:00 UTC, and its replay is available through the official YouTube stream.
What did the notice promise?
Netmarble said the stream would share Version 2.2 details together with special events and surprise rewards. The later update-details notice is the source to use for the live content list.
Watch the official YouTube replay
What is confirmed now?
Version 2.2 adds Lancelot, Elaine Pick Up, Act 17, Cordin Village, new events, and expanded ranking and Timespace content. See the full update details for the current official list.
Official source: Version 2.2 Special Livestream.