I mentioned this elsewhere but it belong here, so banzai! A What-if movie suggestion: In this time line the National Redoubt (Alpenfestung) actually gets activated and the Allies are faced with a nasty, drawn-out fight with the worst Nazi fanatics. A concentration camp prisoner who worked on the fortresses tells the Allies that there is one key installation that controls all the hidden entrances and exits to the underground network of tunnels. A suicide team is sent in and manages to blow that facility up, trapping the troops underground, permanent-like. As they are preparing to leave themselves one of them sees a partially open door on one side of the control center. He walks in just in time to see Hitler shoot himself in the head. I know you lot can fix this.