>>33838749This shot came from an early ORAS trailer. This trailer revealed, much to everyone's surprise, that the legendary pokemon Groudon and Kyogre would be playing roles in the games. Hilariously, the trailer not only told us things everyone knew, but it also lied a bit, as it implied the duo would face off or something.
Groudon's stance, more exasperated than fearsome was then mocked, eventually the two ideas became linked, and now Groudon is used whenever a leak, trailer, or so on either offers no information we didn't already know by common sense, reveals nothing we hadn't heard before, or offers nothing of substance whatsoever.
With MUSU, the meme has shifted the focus to the game itself, with the basic theme of "The game is not substantially different from the game we already bought".