As I am certain you all know it is very unlikely that they will actually take steps towards really developing for Linux. However, that being said THQ has recently Tweeted that they are considering development for Linux. Personally, I'm fairly excited about the prospect, hence me posting this. As stated I believe it is doomed to fail, but I find the idea intriguing as it does hint at the potential of a paradigm shift of sorts. At any rate here is the original article I grabbed this from for those even midly interested in the subject. It's short and contains no more than what I've stated.
http://www.gamebreaker.tv/pc-games/thq- ... velopment/