Disney's Christmas Tentpoles in the future will probably go like this:
2019-Episode IX
2020-Avatar 2
2021-Avatar 3
2022-New Star Wars Trilogy #1
2023-Avatar 4
2024-New Star Wars Trilogy #2
2025-Avatar 5
2026-New Star Wars Trilogy #3
https://www.boxofficemojo.com/schedule/?view=bydate&release=all&date=2018-12-07&showweeks=4&p=.htm
Also, checking BOM's schedule, I guess this is limited now?