More than one theory and none conclusively settled. The movie analogy is a good possibility but others have suggested:
1) allusion to the October Communist Revolution of 1917
2) some connection to the missing Argentinian sub and the Hawaii missile alert
1) Iron Eagle is a Nazi symbol
2) Iron Eagle if I recall correctly refers to a Colonel who won't be advanced to General, or something like that.
If you look at the top of the q research board they have links to the smart sheet and also to the qanon page that archives Q's drops with explanations and you will learn a lot there. You can search for Red October or Iron Eagle. >>332985