I cropped a screenshot down in paint, and then ran it through ZXing, you get the following text.
TEL:3524748087
It is what appears to be a phone number, and after a quick google search, it appears that the phone number's source is Florida, which is good as Trendy Entertainment are based there.
I have yet to ring the number, I am most likely not going to ring it at all, however, after searching for the phone number I found this thread on the Dungeon Defenders Official Forums, and apparently it is just an automated response.
Subscribe to our RSS for updates on when more secrets have been found.