(Update: McDonald's has issued a short press release, confirming the forthcoming collaboration, but not giving any solid release dates.)
According to TechCrunch sources, the companies (Niantic, McDonald's and The Pokemon Company) have decided to cancel the launch -- at least until tomorrow, citing that the hype generated could overload the game. No offense, everyone, but that's still happening everywhere else in world. Nikkei also reported that the game would launch tomorrow, although it's recently corrected its article to suggest later in the week. In short, no-one knows.
McDonald's Japan has recently seen sales soar following its recent Pokemon-themed Happy Meals, while Nintendo saw its share price double. Which is even crazier, given that it didn't even make the Pokemon smartphone game. The leak detailed some issues that the companies need to tackle -- including Pokemon / McDonald's gyms with poor connectivity, and pesky customers taking up space without buying more burgers or matcha flavored McFlurries. If the game does actually arrive tomorrow, I'll buy myself McDonald's, in the name of Pokemon Go journalism.