In the UK the film trailered with an ad for a new game coming out in 2013 called 'Aliens: Colonial Marines' but don't know if it was shown at US screenings.
I could be wrong but I seem to think it was once rumoured (or maybe this was a fan thing) that Blade Runner and Alien could concievably be set in the same universe because of the backdrop of their stories of dystopian darkness, giant Corporations like Weyland-Yutani and Tyrell etc and the look and feel of the films.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist