Before Neil is ever allowed to get near the Alien franchise, let him make his long lost Halo movie first. He was quite excited about it at one time if I remember it correctly. Youtube video aside, give him access to that material and a decent budget, and let's see what he brings to the table before he gets to take the reins on a full blown Aliens sequel.
The weaver situation is interesting. I don't pretend to know exactly what's going on there, but I sincerely hope any demands or conditions she "might" have (or have had) do not prove detrimental to the film, should it be made. If it was indeed re-written to include her, I hope any input and authority she might have over the script is minor going foward. To segway somewhat, I've held back from saying it for quite some time now, and no offense is implied to Weaver or Neil. But, I'm legitimately concerned that due to the current political climate, and the tone of Neil's previous films and Weaver, we might wind up with a VERY political film.
And to clarify on any possible script conditions that Weaver might have had, or may have in the future. I merely mean to state that I'd rather we get to see Neil's original idea for the film. Whatever happens, I'd rather it be the honest portrayal of his original vision for the movie.
"No offense is implied to Weaver at all".
I just hope she doesn't use any potential influence to force changes on a film that could've had serious potential just the way it was.