MovieCastingCall.org released a casting call on February 21st for Star Wars: Episode IX. The key takeaway is that filming is set to begin in July 2017. This will overlap with the untitled Han Solo project, which is tracking for a May 2018 release. With filming for Star Wars: The Last Jedi taking 22 months from filming to theaters it is safe to speculate that Episode IX will be able to hit the initial projection of premiering the last weekend of May 2019 (22 months after July 2017).
Disney originally announced that all the new Star Wars films would be aiming for May release dates. However, both Star Wars: The Force Awakens and Star Wars: The Last Jedi got bumped 6 months from May to December releases. This means that Episode IX could be starting principle photography this early in order avoid the same fate as it’s predecessors.
We will watch closely to see if this target date continues to stay within grasp.