The word "leak" has had its definition diluted into meaningless.

Many years ago, a "leak" was typically someone on the inside publishing something that wasn't supposed to go out. A leaker that got caught would likely face termination, and potentially a civil lawsuit for NDA violation. Back then, a leak meant something.

But over time, simple announcements started to be called "leaks".

It would not surprise me if there are "leaks" that seem to fit the original definition, but are actually leaked on purpose to build hype. Hard to say though, since there are frequently a lot of fake leaks.

Those people were always going to watch. But now you get a load of curious onlookers who showed up because of the "leak" story. It raises the profile for those not aware of the game.

Because releasing the trailer this far ahead of a 2025 release date (that may very well slip) would seem a bit ridiculous, so it gets "leaked" instead.