I remember reading a comic around 2005 about a Batman print with Batman having no talking role.
Plot: Robin and Alfred try to track down the history/origin of Bat cave. They discover that it was old hideout from the war are. Maybe World War II or some other war.
Characters: Only remember Robin (most probably Dick Grayson) and Alfred being there. Batman had a cameo, I guess, but I'm not sure of that.
Title: Looks like official DC comics with Batman title.
Release year: 90s I guess.