I remember when people were saying that Star Wars 7 would never happen.
Worst movie in the whole 'Star Wars' series.
I mean, really. While episodes 1-3 have their problems, they still offer a compelling narrative component that leads into episodes 4-6. It's a set of 6 movies that ultimately have a single and complete story arc - and that arc is basically 'The Rise and Redemption of Darth Vader'. That's the net value of that entire pair of trilogies and ep.7 desparately attempts to dovetail into it but it fails because it's so disconnected.
Ep. 7 is a rehash of everything that's gone before, except it takes place 30 years after the closing moments of the 6th movie and a tenuous reason for doing so - bring back old actors to reprise roles they haven't played for decades.
It's a garbage movie when it comes down to the most important component - the story.
'Rogue One' is a much better movie. One of the key reasons is because it focuses on a fresh narrative with new characters and doesn't desperately shoe horn the story around aging characters.
'Rogue One' is a triumph in this regard because it demonstrates there is no need for a retcon if you want value adding to the Universe.
I'd rather watch the 'ALIEN' equivalent of 'Rogue One' than bring back (deceased) characters just one more time. There's nothing to be gained by doing that. A movie that runs parallel to the events of 'ALIEN 3' featuring USCM combating Aliens is much more welcome.
Something along the lines of 'ALIENS: Colonial Marines' (but not shit) is the way to go.