They already said on Twitter that they have nothing to announce, this was just a community joke, they said they're not clever enough to make this kind of teases. So there is nothing coming for the switch from Blizzard right now
Some of the people from Nerdist were claiming it’s not the first time Blizzard has claimed they’re “not that clever”. So I’m still holding out hope. Even for D3, it would mean the possibility of the next installment too.