It's hard to avoid leaks these days. The internet is full of sleuths, and many creators love being seen as a credible source of exclusive information. To avoid the risk of such things spoiling the game, Insomniac decided to just reveal Wolverine was happening years ahead of release, even if it meant being asked about it well before we'd get to see it.
In an interview with TheGamer, game director Mike Daly explains the logic here. "We announced Wolverine very early because we knew it would be very difficult to keep a lid on it," he says.
