I can't believe nobody has said:
"RRoD will be the demise of the 360."
But this one happens way too often to even list all the games it applies to:
"Judging by early sales, ______ is a flop"
*_____ is then declared to be a success by the publisher and a sequel is announced*
"The worst part about these reviews is they are [subjective]--and their scores often depend on how drunk you got the media at a Street Fighter event." — Mona Hamilton, Capcom Senior VP of Marketing
*Image indefinitely borrowed from BrainBoxLtd without his consent.