I don't like the "real world perspective" of this article. I also don't like how it says that we don't know the location of the Hall of Justice...we do. From 1976-1977 it was Gotham City; from 1977 onward it was Metropolis. The whole "Gotham being adjacent and right across the bridge from Metropolis" bit is totally irrelevant, as it wasn't merely suggested in the show, it was firmly established.
Those were just 'facts' inserted as they became known. Keep in mind that the location in the TV series was hinted but confirmed in the comic book. So what I have is basically a 'real time' progression of the revelation of its location as they unfolded. If you'd like to change it, please do. I would suggest that all the facts are relevant and should at least be recorded in the notes section.