So this is in addition to the Eastern SOU-NCL-ABZ option?
With Eastern it isn't a through plane option but a fourty minute a/c change in NCL
I would never launch a route without 90 days pre marketing at both ends - it’s an expensive mistake to fly routes you think people will automatically migrate to.
But in that time your existing market has found alternatives and might not come back. There must be some benefit in continuity (and generating good will!)