Recently, there was a product available at Amazon at the 23rd of September: it was an officially Nintendo-licensed Overwatch carrying case! This could mean Overwatch is going to be on the Switch, otherwise there would be no reason to make a case for it.

Complemented with the fact Mario Kart Tour's release on September 25th & FIFA 20's release on the 27th, there is a HIGH chance Nintendo will announce a NEW DIRECT ^_^