Diablo III Eternal Collection lets you play with a single Joy-Con
Diablo III Eternal Collection supports a wide variety of controller options. A group of people can play with three Switch Pro Controllers and a single Joy-Con. It also supports a configuration such as two Joy-Con on a single Switch in tabletop mode. Basically, pretty much every natural possibility you can think of works here.
When playing with a single Joy-Con, you’re able to roll by flicking the controller in a quick motion, which Game Informer says is “surprisingly reactive and accurate”. This movement is normally handled by the right analog stick.
As an extra tidbit, Diablo III will feature voice chat support with the Nintendo Switch Online app.