I'm not sure what the development process was like -- they were calling it a sequel for a while before then changing it to a remaster. The reviews suggest that a lot was changed from the original. I kind of want to get it anyway.
Yeah, the team that made it really put all the A they could into that game. You could say it was made by a real bunch of A-holes, given how much A they put into it
It's a joke about how the head of Ubisoft referred to the game Skull And Bones as a "quadruple-A" game. The highest-budget games are often classified as "triple-A", though people also tend to use the term as a way to indicate size or quality. By calling S&B an AAAA game he was signaling that it would be in a class of its own in terms of quality, most likely.
The game itself has been pretty universally considered "meh" at best, so this meme is making fun of the original claim.