Overwatch players read the new story, and before the upcoming challenge, check out the upcoming skin for the game.
The new story is indeed about the Reaper, although it is not a big surprise. You can read it, among others, on the official Blizzard website or below:
The new Reaper skin
This is not exactly a leak, although Sony did disclose information about the upcoming event on Playstation too early. This is a complete standard in the industry, although it is interesting that this is the first time in the world of Overwatch.
Most probably know that Sony adds information to PS about what is currently happening in a given game. In network productions, these are usually events. Dates and details are provided there.
For example, the Fortnite community has already got used to it, hardly anyone believes that adding information there prematurely is a coincidence.
Either way, this time there is a Reaper skin, which you will be able to get today. This is not a complete presentation, but it gives you an idea of what to expect.