Is, as in right now, the worst kept secret in the industry is obviously Spyro
Was, as in in the past, is a tougher question. AC Origins and Shadow of the Tomb Raider both seemed to leak ridiculous amounts of times. Also worth noting that while it didn't leak that long before its announcement, an actual physical playable PS4 slim was out in the wild before it was announced, despite Sony's hilarious attempts at trying to deny it existed
Was, as in in the past, is a tougher question. AC Origins and Shadow of the Tomb Raider both seemed to leak ridiculous amounts of times. Also worth noting that while it didn't leak that long before its announcement, an actual physical playable PS4 slim was out in the wild before it was announced, despite Sony's hilarious attempts at trying to deny it existed