Liam Neeson voiced Qui-Gon Jinn in a couple of episodes of Star Wars: The Clone Wars. He also joined the Jedi chorus in Star Wars: The Rise of Skywalker. The prequels and The Clone Wars make it clear that Qui-Gon is the first Jedi to figure out how to do the whole “Force Ghost” thing. However, that means that technically, Qui-Gon Jinn could appear in some forthcoming Star Wars project, like the upcoming Ob-Wan Kenobi series, for example. Unfortunately, unless Neeson is skating around the issue in order to keep a surprise, it doesn’t appear that’s in the cards.