I’m also somewhat cautiously optimistic about Trevorrow as director of SW IX.
If Rian Johnson actually ends up writing the scrip then I’m fine with it. But if Trevorrow ends up writing it, then I’m anticipating bad things. But if his writing influence remains on the same level as Abrams’ on TFA, being second to a more competent writer, then I think it can work out pretty well.
Also it’s not like he’s going to have to think up SW from scratch, Kasdan and Abrams will already have defined a new lore, and Johnson will have continued it by that point.
Visually speaking however I’m not really worried at all. Now that Abrams have set a standard with TFA, one which I assume that Johnson will follow, there really isn’t much that Trevorrow can add. Sure, I was very disappointed at all the CGI in Jurassic World, but I’m getting the impression that it wasn’t really up to him, and again Abrams have set a standard in TFA that I doubt he will be able to deviate from. Considering how TFA have already been marketed as a “practical effects film,” and Johnson seems to intend to do the same, it would be weird if Trevorrow would even be allowed to do anything else.
I also don’t think that he’ll shoot the last film in the trilogy digitally, since he after all shot Jurassic World on 65mm and was described in a Kodak interview as a “film convert.” And even if he directs any films digitally in the following years before SW IX, I don’t think Disney will want such a big inconsistency after TFA and SW VIII will have been shot on film.
Heck, even Rogue One is beeing shot mostly on film, which is weird since Gareth Edward have so far shot all his films digitally(EDIT: seems like the anthology films will be shot digitally). My guess is that either Disney is trying to keep the films visually consistent, or that Abrams may have had some influence on their decision.
It may sound kind of strange, but I don’t think Trevorrow will have too much of an influence on the making of the film, and therefore I don’t mind him directing it.
Also, isn’t Abrams supposed to be the producer on both SW VIII and IX?