This is the Marvel Vs DC movie trailer edited together by Youtuber Alex Luthor. Wait -- THE Lex Luthor? You would think he'd be too busy supervillaining and hating Superman to find the time to edit fake movie trailers together. Yet here we are. Maybe he outsourced all his villaining. Which, AGGRAVATING FACT: is how telemarketing was invented.
Keep going for the trailer.
Thanks to Dan E and Julian, who both expressed an interest in watching a full-length version.