A reboot wouldn't necessarily have to go over the origin again in any detail.
Exactly. Reboot doesn't mean 30 minute origin story. Though I do think the origin should be covered, though it could EASILY be covered by a five minute montage during the opening credits. Nice and simple, and everyone in the audience would get the broad strokes of his origin.
The John Williams Superman theme is 4 minutes and 28 seconds. I bet you that, in that time, not only could we get all the necessary movie credits, but we can get a montage of scenes showing Superman's origin. 30-second or so clip of life on Krypton, and tremors affecting the planet. 30 more seconds of Jor-El and Lara saying goodbye to baby Kal-El and his rocket leaving Krypton as it explodes. Another minute of the rocket crashing in Kansas and being found by the Kents. Scenes of young Clark growing up in Smallville. Add in some scenes of his travelling around the world for a few years after graduating high school, and boom. Theme song ends, credits are over, and the movie proper begins. 4 minutes and 28 seconds.
As for making a reboot, I mean discarding all the prior Superman movies and starting over. Let's see Superman's first days in Metropolis, again. I want to see the movie effectively starting on day one of his arrival to Metropolis, becoming a writer for the Daily Planet, and his first days as Superman. That's the movie we should've gotten. Not with some some "vague continuity".
At this point they should make a sequel. I mean it is better than letting it just die another 20 years.
A sequel "just because" is a terrible idea. That's pretty much guaranteeing that the sequel is dreck. And if the sequel is dreck, then you're making sure that the franchise DOES die for 20 years. The last thing Superman needs is another movie rushed out "just because".
Besides, you don't need to wait 20 years to make a reboot. Just look at The Incredible Hulk. That only came out a few years after Ang Lee's crapfest and successfully rebooted the Hulk franchise. They can just as easily reboot Superman.
Um, there are a ton of people like me who feel Donner's so-called "outdated" movie is one of the most iconic and faithful portrayals of the character there's ever been.
Yeah, and there's a word for that. It's called being "wrong". :P Those movies had their good points, but they were also atrocious in other ways. Like Lex Luthor's portrayal. It was absolutely ridiculous, as was the whole "fly around the Earth really fast and make it spin backwards, thus travelling back in time". That was terrible. Superman II was much better, but it still had its weak points, like Superman and the Kryptonians displaying powers that they never should've had, like teleporting. Huh? Since when? And since when does Superman throw his S shield around and it turns into a giant plastic tarp?