Neill Blomkamp, who is currently working on the fifth ALIEN film, just posted another piece of artwork online with the caption:
#alien going very well. Love this project
The artwork depicts Ripley (Sigourney Weaver) in conversation with a space marine, accompanied by MIchael Biehn's Hicks, with half his face melted away as a result of his unfortunate run-in with the business end of an uncomfortable amount of acid in ALIENS.
It's not a lot to go on, but any news is good news when it means more ALIENS is just around the bend. No date has been announced yet, but stay tuned!