Looks like Microsoft made an "oopsie" this time as they've just accidentally leaked what looks to be the latest Overwatch skins on Xbox Live even before Blizzard revealing any information about it.
As seen from the images uploaded by Reddit user AsranStark, Tracer, Reinhardt, Mercy and Torbjorn are wearing the Original Overwatch uniforms, exactly like the ones they were wearing at the end of the newest Overwatch comic- Uprising.
Since the timeline of the comic takes place 7 years before the current time in the Overwatch World, there are a few other changes to the appearances of these heroes instead of just their costumes. For example, Torbjorn's beard is so much shorter seven years ago while Mercy still has a short hairdo.
Even though the leaked image only shows four new skins for Tracer, Mercy, Reinhardt and Torbjorn, Overwatch players can safely assume that more skins besides these will be released as well, since Overwatch Game Director has confirmed that McCree and Widowmaker will be getting a new look during his Reddit AMA session last month.
Furthermore, the ending of the comic and the leaked image suggests that Tracer, Reinhardt, Mercy and Torbjorn will be the playable characters in the King's Row Uprising event game mode. Perhaps a PvE event like Junkenstein's Revenge? The new game mode is expected to be very good since the Lead Character Artist for Overwatch, Renaud Galand himself is hyped up about the team's own project. "I can't wait to share more of this as it is, in my opinion, one of the best thing we have worked on since launch!" Galand posted on his Facebook page. Besides that, Jeff Kaplan also mentioned in the interview conducted by PCGamesN that the event was inspired by the feedback and suggestions from the Overwatch community.
The King's Row Uprising mission files will be declassified on April 11, but the exact time has not been set by Blizzard. Whatever it is, I can wait as long as it takes, if and only if Blackwatch Genji skin will be released along with the event.