From what I’ve been able to find out, traditionally I guess any scheduled Timewalking events around an expansion launch are canceled.
That is intended and from what I was told the events will pick up normally and continue the schedule. So if Burning Crusade Timewalking was cancelled and Wrath of the Lich king was next, Wrath will continue to be next. BC isn’t delayed and fills Wrath’s spot.
Sorry I don’t have better news, folks.