Joker was picked over an SMT rep despite SMT5 being one of the first exclusive third party games announced for the Switch. Banjo was picked over Steve despite Minecraft being a best-seller on the Switch. What game is on a Nintendo platform at the moment isn't what Nintendo is mainly focusing on when picking these characters.
As
SharkLord
says, Shin Megamei Tensei V wasn't far enough along to be factored into a pick from Atlus (and judging by how little we've seen, it probably still isn't).
As for Minecraft, it may have sold well, but it's didn't also get any new releases during the fighters pass like Monster Hunter is; the cross promotion isn't as strong due to the lack of a game that's shiny and new. Banjo-Kazooie didn't have that either, but they did have a bunch of fan demand, so it's easy to see why Minecraft and Banjo-Kazooie were on equal footing. Dante, on the other hand, doesn't really have this, as his popularity surged after the pass was decided, and his shiny new game is on every console but the Switch. Because of this, I don't think it's right to say that Devil May Cry is as likely as Monster Hunter unless this is going to be rectified fairly soon. I do recognize that this is not an impossibility, but there's currently nothing to suggest that it will happen, and thus, my verdict remains the same.
Hmm...actually, after considering the possibility of a Devil May Cry V port rather than assuming it wasn't a thing (since the absence of evidence for it isn't a disconfirmation for it), I will change my prediction slightly. I do still think that Monster Hunter is currently the more likely option, but the possibility of the Devil May Cry V port does keep Dante from being an unlikely pick.
Unless Nintendo dream is announcing Miitomo is coming back, Idc
Inb4 it's Tomodachi Life 2.
I wonder...do you think we'll see any Mii-centric games in the future? I kind of feel like the Miis are being phased out.