Of all the things I've seen in the Overwatch fandom, this takes the cake. A team of eight developers led by Lucy Morris (of Ubisoft, as well as her own projects), and Damon Reece (of Starbound and Staxel fame) has come together to make an Overwatch dating sim called Loverwatch.
The game is reportedly set during the period when Overwatch is at its height - you play as a new recruit who joins up with Overwatch, and can choose from three paths at the beginning of the game based on your profession (for example, a player can choose to be an Oceanographer and partner with Mei).
These paths determine your partner for the game, and will allow you to romance them throughout the course of the game. You can choose from Mei, Genji, and Bastion - yes, you can romance everyone's favorite walking turret (who communicates in full on R2-D2 esque beeps and boops).
The game's been under development since the beta ended, and reportedly is already 180,000 words long including all three paths in the game - longer than Final Fantasy XIII.
As for those fans hoping to play as other characters, you might be out of luck. Lucy Morris said on the topic:
I think there might be a bit of dashed expectations between the players and the game, because new people come to the blog and they think that every one of the 21 heroes is going to be in it. And with the length of the script, that’s simply not possible for us right now. And we might work on that going forward and add one route every now and then, but I think that one or two people might be disappointed that their love interest was not included.
Fan made games have come into the spotlight, especially with Nintendo cracking down on them. Turns out that's not much of a concern for the dev team:
I expect it less from Blizzard if the content isn’t objectionable. Because I know the people who made [the] Starcraft 2 visual novel, and Blizzard okayed that. But I guess that’s always kind of a concern in the back of our minds because we’ve spent quite a while on it now. And that’s why we tried to reach out and ask them if it was going to be okay. We’ve tried to be as agreeable as possible, by making sure there’s no R-rated content, making sure we treat their IP respectfully, that we do a good job of it.
The sim is set to be rated PG-13, so while there will be some mature themes, we're unlikely to see any straight up hentai. The dev team says there's about a month left of coding the insane amount of dialogue into the game.
The full interview is quite the fascinating look into what drives the development of fan games, and fandom in general - you can check it out on Kotaku.