Please note that this is just a rumor at this point but it comes from a pretty trustworthy source. A Saints doctor has been noted as saying the Saints are, in fact, lying about the severity of Pierre Thomas' injury.
I couldn't tell you how much more severe the injury is or when fans could expect Thomas back on the field but this piece of information would certainly seem to go along with all of the suspicious activity surround Thomas' knee. Given the high level of secrecy shrouding this injury, I'm beginning to worry it's pretty serious.