User blog:Justin Holland/Crisis on Earth-X

https://www.youtube.com/watch?v=CIYvJ7akMfc&feature=push-u-sub&attr_tag=Z1Ig4gsmqb-gtUZU-6

https://www.bleedingcool.com/2017/09/22/crisis-on-earth-x-is-the-arrowverse-punching-nazis-versions-of-themselves/

Here's the proof, probably the most personal crossover.

and something simliar: http://arrow.wikia.com/wiki/User_blog:Xandermcc/Next_Crossover_Theory

Your opinions?