I always thought Soldier took place in the Aliens universe but the BR connection sounds better. I always like when film makers pay tribute to their favorite movies like this.
Actually, I think they all are supposed to take place in the same universe. If you include easter eggs, that grows to include Firefly/Serenity. Blade Runner and Alien took place in the universe according to a few Scott interviews from the 80s I think.
If you pay attention, all of the seasons bar one of Power Rangers occur in the same world, the exception is R.P.M., but in my mind that one is a travesty and an abomination, and doesn't count. ALSO, if you paid attention in, it's either the fifth or sixth year (Turbo or in Space), can't remember off hand and don't want to go look it up, the Ninja Turtles make a one episode appearance. Crazy, and it counts.
Power Rangers in Space, wasn't half a bad episode if I remember right, may have to Netflix that one.