I have often said that the only way for DC to get out of this mess would be a year-long Superman maxiseries (similar to 52) which would retell everything about the character from the origin to current days, finally establishing what's canon and what isn't (the length would be more or less the same as Byrne's original run on Supes). It's not that there isn't material which can't be revamped by the way - it is actually surprising that no one ever proposed an updated version of the first encounter between Lex and Superman from the Golden Age, when Lex was a mastermind and a warmonger flying around in a steampunk-style airship.
Of course, it will never happen, firstly because DC isn't interested in doing it, and secondly because even if they did it they would be way more interested in putting as much effort as they can in trying to find a way to reconcile every possible version of stories from the Golden Age or the Silver Age instead of telling their own story, with its own identity. Say what you will about the Triangle Era, but at least - while Simonson and Jurgens were still on board - they tried to tell what they had in mind, instead of banking of nostalgia.