Thought this might be an interesting topic.
Just re-read one of my favorite DC Comics Presents stories the other day that was in a recent Showcase trade that had Superman fighting with the Spectre where God talks to Superman at the end of the story.
This was back when Supes could do pretty much anything. In this story he's trying to rescue his cousin when he's stopped by the Spectre as he's about to cross a barrier that he's not supposed to nor is he allowed to. All he had needed to do was just ask. Nice ending to a good 3 part story that introduced Mongul and besides the Spectre also had Supes teaming up with the Martian Manhunter & Supergirl. I originally bought it because I had never read a story with Martian Manhunter at the time. The story drew me in and I was blown away that God actually spoke to Clark towards the end.