To be fair, Metzen has already hinted/suggested that Illidan could indeed be coming back. No, he didn't mean the CoT instance either - his quote was something like "I'm a sucker for a good redemption story".
EDIT: In regards to the OP's topic - bunkam. Don't believe it at all...
Seriously, if people want to make stuff up - at LEAST make it seem legit - at least put up a fake website page that MAKES it look like it's from some fake "credible" source. >_<