Hmm… The cgi / de-aging could simply be a one off, perhaps a measure used to avoid leaking out the big secret.

Now that we all know Luke’s in the mix, and that he’ll likely have a large presence in future live action, they could easily resort to Sebastian Stan or the like and use prosthetic makeup and practical magic. I can see this also being done for Alden Ehrenreich and a possible new Leia.

It could be that “Rangers of the New Republic” follows Luke, the jedi and how they fit in with the Republic. It would also be a golden opportunity at showing the inner workings of the new senate with Leia and the republic fleet with General Solo.

But I digress.