The first bit of Aliens: Colonial Marines has been outed by Walmart. Suspected to be a "horde" mode, the "Bug Hunt" game type has been valued by the retailer at $14.99, though the coupon the mode was outed by suggests Walmart may be giving it away.
Fifteen bucks seems a bit steep for one DLC mode, if it turns out to be true, especially considering the game's $30 DLC season pass. If this is rolled into that, it'll be half the "season" taken up with one bit of content. Of course, that's only if it's part of the season. We'll have to wait and see what SEGA does in March, when the content's due to hit.
We're playing Colonial Marines right now, and will have a review for you in the graveyard hours of February 12. You will really want to check it out!