User blog comment:Taw2541/I am officially done with Arrow/@comment-26624146-20171129092720/@comment-27673963-20171129093913

Cause you didn't watch the crossover I will summarise the main parts.

Earth-X is all Nazis they invade Earth-1

Oliver and Felicity get married

Barry and Iris get married

Half of the crossover is Olicity drama

Martin Stein dies

Reverse Flash from Season 1 is still alive and escapes at the end

That is pretty much everything you need to know for the other shows