After Amazon potentially let the cat out of the bag with a product page showing an Overwatch themed Switch case, Kotaku is reporting that the Blizzard Hero FPS will be coming to the Nintendo Switch in October.
Per the Kotaku report, the report stems from a few leaks posted to Resetera (and also confirmed by Eurogamer). The post on the gaming forum showcases a few retail listing showing upcoming dates for game releases. While the report shows October 18th for Europe, Kotaku reports that North American fans of Overwatch can get their hands on the game on October 15th.
You can read the full report here. Also, don't forget about the Nintendo Direct set to begin at 6pm EST/3pm PST.