The city wasn't in ruins. People weren't running back and forth from the chaos that he remembered so clearly. And most importantly, it wasn't around. He remembered hearing that Doomsday had been defeated, if not only for a short moment before Superman himself fell into the black.
He woke up here, lying atop a roof in his uniform. It wasn't battered or dirtied up as he remembered it being before, and that alone was confusing enough. But when he came to realize that he was no longer in the city that he belonged to, Superman began to seek out as much information as possible. People seemed more than eager to assist him, muttering things about 'books' and 'movies' that he didn't ever fully comprehend. Eventually he found his way to the Daily Press, where he learned that Lois -- his Lois! -- was here. In the very same city. Under the employment of a paper that certainly wasn't being run under the watchful eye of Perry White. Again; that left room for confusion.
After a little convincing, he managed to pry her location away from the editor. They usually weren't allowed to hand out personal information like that on their journalists, but in his case, the editor seemed more than interested in making an exception.
Minutes after getting what he needed, Superman found himself hovering just outside her window. He rapped at it lightly and waited.