Since you seem to struggle with that new thing called Bing and Google, I'll help you out with what publicly leaked from what I know:
Here's an article from when it leaked that Trevorrow was fired for wanting Luke alive in Episode 9:
https://www.inverse.com/article/42797-star-wars-episode-ix-rumor-luke-lives
And now what I'm going to let you do, since you are so worried I'm writing a "fanboy manifesto" instead of having worked with Lucasfilm at times in the past, is I'm going to let you use that Bing / Google contraption that I told you about to find the interview where Mark Hamill confirms that he and Trevorrow worked on Luke's character in Episode 9 together, and that Luke would have both been alive and VERY powerful. Mark was not happy when Trevorrow was fired, he was not happy at all with Rian Johnson (the two sort of hate each other), and Mark still holds a pretty big grudge that the original gang didn't get to be together in the first film. He's not a happy camper.
Now... all that said, I'm going to give you a little bit of insider information below... it is in the spoiler-ish category, so if you don't want to read it, you need to skip this now:
Episode 9 SPOILER ALERT (highlight to see):
The call came down from Alan Horn as a non-negotiable late last year that Luke Skywalker is to return in Episode 9 in a non-ghost form. The call also came down that Luke Skywalker was to be in a battle in the finished product in which he wins, and that he must appear triumphant and heroic by the end of the film. This was very contrary to Kennedy and Abram's script, as well as Lucasfilm Story Group's ethos. However, it was given as a concrete directive. This resulted in rewrites and reshoots beginning in January of this year to bring Mark and the gang back in to get Luke Skywalker much more prominently featured in the film.
Spoilers End
As for Galaxy's Edge, there's more spin today, but I've typed enough for the morning, so I'll grab those articles later for another update.