Not to be a debby downer, but if that ever did happen the GOP would be forced to finally cater to Hispanics, and there is a strong conservative bend in some Hispanic communities. Right now the Dems have a big advantage because Republicans actively hate anyone that isn't white, but if they ever get their shit together they could make big inroads into the community.
From a purely political strategy standpoint, the GOP have just handed away millions of votes in a strategic disaster.
I mean, on paper I'd be a Republican voter, but that would require them to actually practice what they preach, and that seems vanishingly unlikely. The GOP has known they should be targeting for Hispanics for years now, has lost elections because of that underperformance, and has done absolutely nothing except double down in the other direction. I don't think they're gonna' suddenly figure out how to not alienate nonwhite voters, especially after the damage Trump especially has done to their brand.
Young Hispanics follow the wider trends of the younger generations. There's not really any future in trying to appeal to old hispanic voters.
Besides, conservatism in the US becoming more inclusive and less white sounds like a win to me.