Though mind you, it’s a shame a certain Swedish metal band is all but certain to be butterflied away… if he lived long enough to hear it, he’d enjoy their song about him:A) von Richthofen aides were upset about the comic strip but he was flattered and sent an autographed strip with Snoopy fighting the Red Baron back to Charles Schultz.
B) The 1960's had a number of novelty hit records so it wouldn't be out of line for the song to be written but this is something that is up to the Author to decide.
C) Once again the 60's were full of novelty hit records and it is very likely if there is this song ITTL it would be a hit.
D) Of course he will if one thing that this timeline has established is that Manfred von Richthofen has an enormous ego and he will be interested in anything about him.
E) At first glance the only one brave enough to ask him would be Margraffin Marcella von Holtz but I could see Maria von Mischner-Blackwood singing the song in front of him while all the other adults are trying to stop her.
F) von Richthofen would see this as a way to keep his name and reputation front and center to a new generation.