Pretty much all the Charlton characters are stilla bout, in one form or another. The Question did indeed have his own series for quite some time, and he was one of the leads in 52, until he died.
The NEW Question is the co-feature in Detective Comics now, and i like her a lot, I have ever since Batman The Animated Series.
Blue Beetle may be the “Biggest” character to come out of the whole thing. He had his iwn series for a while but then became mainstay in the Justice League International books for more than a decade, he became part of a much loved comedy super-team with Booster Gold, and then he was murdered.
The NEW Blue Beetle is the co-feature in Booster Gold now, he’s okay.
Captain Atom had his iwn series for a while, and then moved into the Justice League International books. He was supposed to actually turn into an evil demigod in the early 90’s, but thanks to a fan phoneline he avoided that fate, and didn’t become the Evil Demigod until about 3 years ago.
The other Charlton characters are sorta wandering the background of the DCU, Peacemaker is a co-star in the Blue-beetle books for example. Watchmen really would have ruined these characters, at least in the sense that they could never be used in the main DC books again, and that would be sad really.