Camera companies get leaked and outed all the time. Usually, it’s about new releases, with specs and images coming a few days before an official announcement. Usually, it’s random employees that either screw up genuinely by accident or they “accidentally” (allegedly) pass information along to somebody they know will shout it from the rooftops. Sometimes, it’s retailers jumping the gun a little too early.
But it’s funniest when the manufacturers do it themselves. And it happens more often than you think. GoPro’s done it, so has Nikon and also Fuji (twice). This time, it appears it might be Leica in their Leica M11 keynote video released in January which seems to feature a couple of potential clues that they’re at least prototyping a medium format camera with plans to release one, even if it’s not ready just yet.