A THQ spokesperson has confirmed with GamesIndustry that the company will not have its own both at E3 2012.
The representative mentioned the company may not have its own booth, but they will not be absent from the event entirely. Their presence will be in a "more limited capacity".
Here's the full statement from the THQ spokesperson:
"We're not producing a booth, but we will be participating in E3. We will be showing games to the E3 judges at their event coming up, and we'll be hosting a press and business center at the show for meetings (as well as participating with first party activities. When we needed to make the decision on the booth (many months ago) we were in a MUCH different place than today. But, we will be there to support our portfolio and the show itself."
According to GamesIndustry, some booths can cost up to $1 million. THQ's current financial state obviously prevents them from doing this, which is why they won't have their own booth this year.
It's possible WWE '13 will be displayed and talked about at E3, although it has not been confirmed at this stage. We'll just have to wait and see this June.