Could there have been a better cast movie?

Almost ALWAYS, with a big movie like this, I'm left---yes, even before the release---wondering, "Couldn't they have done BETTER?" with the casting. Not so this time. Not at all. Some of the "lesser" (I don't like that term, but you get my meaning) roles I had to look up and check out, because there are some UK actors that are not as well known here in the USA, BUT, on second glance they were found to be MORE than capable. I don't see a weak link, in other words. None. From directing, to scripting, to art, to concepting, to photography, to CGI, to building/construction, to acting---there is just NOTHING to get in the way of this GREAT movie. And I do believe it will be regarded as GREAT from the time it hits the screen. Heck, even the media cannot wait for it. That's so rare for a SciFi flick. BUT, this movie cannot be ignored, PURELY based on the starpower of its cast and director. Once again, has a greater ensemble cast ever been assembled for a Sci Fi?