I don't know if you have already spoken of this, but I think there will be a sequel in TII, not in the ordinary sense of the word "sequel", rather in the sense that, as Jermaine said about the movie, "this is not all there, it's not all over. "
In fact in the movie twice in the background is a sign that means "This Is It, Part 1 " as to say that there will be another date or other dates with MJ.
The two moments when I read "Part 1"are:
a) at the beginning of the film, the black hole in the large neon THIS IS IT, for me, is clearly a number 1, that means “THIS IS IT 1”
b) then, when there are the "soldiers", in the background we see an arc formed by a P and an 1, like "P1" (Part 1) .
If you have already discussed this,( I am not able to find it), delete my post.
I add two photos, not great quality, but now I am not able to do better; in the film you can see more clearly.