This just in... My prediction was wrong. Off by 70,000! Damn, close though (Still have tomorrow). Still standing by the 2 million - 2.5 million this weekend.
Blizzard games have a community for decades. Warcraft III is still played by about 7,000 people on weekends 15 years after release. Starcraft was huge for 12 years before the release of Starcraft II. I still think Starcraft original is big. Same with Diablo, Diablo II, and World of Warcraft. As for sales I'm sure PUBG will blow Overwatch out of the water and no way Overwatch will hit over 1.5 million concurrent players (maybe at release on all devices). Overwatch will last longer, PUBG will grow huge fast and probably die fast.
PC gamers are fickle, one wrong move and your game is hated by everyone. (Happened to COD, happened to GTA, and will most likely happen to PUBG)