Should be getting my Gray Niagara this week. While at York I went on a mission to find out who might produce 21st Century Limited passenger cars to match this engine. I was possibly going start with the RPO/Baggage cars in 2018 Lionel catalog to start in hopes of a release of passenger, sleepers, and etc... to be produced in the future.
I spoke to Mr. Kunkel in the booth and asked about plans for the additional set. He was a little unclear with their intentions. When I asked if there were any plans for a 20th Century Limited set in the future, he responded that it was a real possibility that we could see these in about 2 years. Enough to agree with me that I should not purchase the cars in the 2018 catalog. MTH booth personnel told me they were not even considering it at this time. Not gospel, just what I was told at the show.