Resolves yes if Tadej wins all 3 Grand Tours. Currently no indication he will even ride the Vuelta, but boys and girls can dream.

If there's a good year for it, it might be this one. See Contador's comments that Tadej should and will go for it if he pulls off the Giro-Tour double.

https://www.cyclingnews.com/news/alberto-contador-if-pogacar-wins-the-giro-ditalia-and-tour-de-france-hell-try-for-the-vuelta/