I saw someone from CZ-USA earlier this year saying that distributors do the bulk of their ordering for a particular year in the fall of the previous year. For new models, this often means "announcing" the gun the year before it's released, then distributor purchases in the fall, then unveiling at SHOT at the beginning of the year it WILL be released, then months of people like me whining that it's not out yet, then it gets released.
IF these new P-10L and P-10S pistols are not getting built until the new plant opens, and that plant opens in 2018, we likely wouldn't see them until 2019 or 2020.
But I don't see why we would assume that CZ would wait until that new plant opens to produce them. That doesn't make much sense.
The P-10 has a lot of publicity going, and it would make sense for CZ to strike while the proverbial iron is hot. I would expect one of the other models to hit next year, the same way they released the P-07 one year and the P-09 the next.