It can indeed happen that Remco proves to be a GT contender after all but it would be a sudden shift in a trajectory that no other current, steady GT contender has recently showed. It's becoming more and more unlikely.
One can actually see a little bit of Mas trajectory in Remco, just that Remco is slightly younger and have a bit better results (looking here at GTs only, overall the results are massively better).
When Mas was 22 and did his first GT he had a 3rd place in the break in the first week and then he faded and didn’t do anything until he helped Contador on Angliru stage 20. He ended 71st in GC.
Remcos first GT (age 21) he was good the first week, then faded and DNF’ed while he was still top 30 in GC.
In Mas second GT he was second behind Simon Yates in Vuelta and won a stage. In Remcos second GT he won two stages and GC.
Then in his third year racing GTs Mas did the Tour and he started pretty well. After 13 stages he was 4th in GC and ahead of the eventual winner Bernal. He then got sick and faded a lot and finished 22nd. He did not race the Vuelta that year.
In Remcos third year racing GTs he was leading the Giro after 9 stages but abandoned with Covid. He then rode the Vuelta, failing the GC bid but still finished 12th with 3 stage wins.
Then in Mas 4th year riding GTs he was 5th in both Tour and Vuelta confirming he is a quality GC rider and laid the foundation for repeating his best GC performance the two following years with another 2 GC podiums in the Vuelta.
If Remco follows Mas trajectory adjusted for his slightly higher level that should mean a top 5 in the Tour next year and winning GTs (but probably not the Tour) the two following years.