With early September's Nintendo Direct came several interesting announcements, including both the announcement of a new fighter in Super Smash Bros. Ultimate and an Overwatch Switch port. As a result, many viewers of the Direct started speculating about the possibility of Overwatch characters coming to the popular fighting game, and this includes the producers at Overwatch developer Blizzard, as well.
In a recent interview, Blizzard producers Andrew Boyd and Wes Yanagi talked about Overwatch's upcoming Switch port. Furthermore, they discussed the idea of one of the game's characters being brought to Super Smash Bros. Ultimate to fight alongside the likes of Mario, Link, Kirby, and others.
Regarding his ideal hero for Smash Bros., which is about to see the arrival of Fatal Fury's Terry Bogard, Boyd said that it's "hard to pick your favorite hero" and "All of them have their own draw in Smash and it’s a really cool idea.” Yanagi had added that every Overwatch character is his favorite and that "It would be an awesome thing to have but that’s up to Nintendo right now.”
This seems to cohere with what other developers have said in the past regarding their characters appearing in Super Smash Bros. games. Oftentimes, developers have said that they would love for their mascots to join the fight but that it was up to Nintendo to make the call. This had been the case with Solid Snake, Banjo and Kazooie, and others.
Blizzard's uber-popular Overwatch has plenty of characters to choose from, so it's hard to just pick one. Overwatch's Tracer is one that immediately comes to mind, given that she graces the box art for Overwatch and, thus, acts as a quasi-mascot. However, characters like Reaper, D.Va, Zarya, Genji, and Doomfist would all be fitting additions given their dynamic quality and distinct characters.
The next Super Smash Bros. Ultimate fighter still has yet to be revealed. As such, it could very well be announced that Overwatch will get its own form of representation in Super Smash Bros. Ultimate.
Super Smash Bros. Ultimate is currently available for Nintendo Switch.