Even assuming it was almost impossible, that would still be something that is on their list for sure.
But I don't think it's even close to impossible, it doesn't need to be the next major (the next major would complete a 3rd major in a row, but they could win another with the same line-up). But even 3 in a row, if there's a team who can do it it's certainly them. 4 months is a long time, even if they get figured out, they still have time to correct and come back with other stuff. And that's only if they get figured out, people have been betting on the end of their dominance for quite a while, and yet despite losing at some events from time to time, they still managed to come back, so I'll believe it when I see it.
Of course there's the possibility that they get figured out around the time of the major, in which case they could be fucked. Or the possibility that they don't manage to come back. But same here, I'll believe it when I see it.
Not to say that it's in the bag though, it's probably the hardest thing they would have to do, even compared to what they've already done. If I were to bet I would say that their chances to win a 3rd major with the same line-up are about 1/3 at the moment. And their chances to win a 3rd major in a row are about 1/5. Of course those numbers are straight out of my ass and subject to change as time passes, but you know, just to make it clear that even if I don't think it's close to impossible, I don't think it's easy by any means.