Pre-production and development hell aren't what I was referring to as production, though I'm aware of those processes having gone on for a long time before the movie actually entered production. The game went into development before the film went into production. Upon searching, Avalanche has been quoted as explaining that while there was at one point a plan to make the game and movie very closely tied, the game since became standalone and is not a tie-in to this film.
One reason cited being that they think tie-ins are terrible:
http://www.shacknews.com/article/80824/mad-max-not-a-movie-tie-in-says-avalanche-game
It's the Mad Max universe, but not a Fury Road based game, which is what the examples I posted before did too. I'd assume their set visit was part of when it was more tied to Fury Road or they want it to resemble the new film in some ways to encompass the universe despite it being standalone in the canon.