It's only too dark when I have to turn my monitor up.
Kidding aside... Yeah, I dunno. If you ask me, the prequels are the darkest slice of Star Wars; yet they are filled with light, beauty, colour, grandeur, and whimsy. I mean, can it get much darker than ROTS, really? But look how Lucas manages the final events of that film. After all the pain and suffering, there is an angelic sense of hope at the end.
So I guess it comes down to tone; or more elusive properties. What I personally can't stand is dour. Or forced darkness. I've always felt a lot of other blockbuster entertainments suffer from this, but not Star Wars. I always think it's worth bearing the series descriptor in mind on Wikipedia:
en.wikipedia.org/wiki/Star_WarsOr the description given on Wookiepedia:
starwars.fandom.com/wiki/Star_WarsOr, for that matter, the description on its Reddit page:
www.reddit.com/r/StarWars/Two of those descriptions use a term I like and believe is central:
epic space opera. Of course, on Charlie Rose in 2015, Lucas insisted the series was actually closer to
soap opera, though I think he was talking more about the main saga films (which he, of course, invested all his creative energies and personal resources into).
The idea of Star Wars being a space opera, and epic in its modality, should help keep creatives (and fans) on the straight and narrow when it comes to expanding it and fashioning new works in its name. It isn't "Star Trek" or "The Twilight Zone". It's its own beast -- heavy, thematic, intense, foreboding; yet also broad, sweeping, zesty, propellant,
fun.
Star Wars is the idealised realisation of a unique concoction started furtively back in the 1930s with "Flash Gordon", yet despite the success of the Marvel franchise, it has no rivals in its class: i.e., it has become
the epic space opera of our time. So do right by it. Do it dark, do it serious; but don't forget colour, vigour, humour, bold spectacle, and a sensational scope. For every insipid Imperial or invisible moisture farmer, there is a Jabba the Hutt and a General Grievous. For every stoic Jedi or scheming Sith, there is a Watto and a Jar Jar.
Another part of the descriptions I like there is the end of the Reddit one, where it declares that the franchise is "centered around a film series that began with the eponymous 1977 movie". Concentric circles. The germ of Star Wars is the original film, the endosperm is the saga, and the bran and the husk are whatever gets put around the films and the saga to keep their basic integrity intact. Crude analogy, but you get the idea. Of course, over time, the brilliance of the original saga films may dim as they become swamped by ever more content on the periphery; but for now, and for a long time to come, they remain the hinge and the pivot of the whole franchise.
The Wookiepedia description also notes a core set of ingredients: "the Star Wars franchise employs archetypal motifs common to religions, classical mythology, and political climax, as well as musical motifs of those same aspects". As soon as you lose these, you lose the essence of Star Wars. The franchise constantly evokes elements of sacrifice, patterns of consumption, and eras of decline and instability that are as old as human civilisation itself. If the historical and cultural intelligence of Star Wars is forgotten or pushed aside, the franchise will cease being Star Wars.
Last, but not least, let me not overlook the fact that George Lucas gets a mention in all three descriptions: "created by George Lucas" is a phrasing shared by all three. Going forward, I think it needs to be kept in mind by all people that work on Star Wars and consume it that the core aspect of the franchise was created by one man; or is the vision of a singular personality. Thus, while pursuing their own artistic visions, they should always ask the question, "What would George do?" If they cannot ask that question sincerely or arrive at sincere answers, they are making or consuming something that is Star Wars in name only. Hopefully, with his original saga films and what he approved of for "The Clone Wars", Lucas has laid a firm foundation.
So, yeah: darkness is allowed. But just remember that Star Wars follows its own rules for that. I believe, given the Taoistic overtones of the Force, light and dark can co-exist in this franchise, but a careful balance has to be maintained. Star Wars should never be dark for its own sake or because it fits with existing trends. To quote the song "T-U-R-T-L-E Power" from a childhood classic:
Remember the words of your teacher, your master:
"Evil moves fast, but good moves faster!"
than light shining for your illumination.