User blog comment:MakeShift/Arrow and The Flash to crossover in a two-hour event!/@comment-1104107-20140720023510

I'm excited for this, it reminds me of Buffy/Angel's crossovers back in the day. Interesting Buffy/Angel's first crossover event was also the eighth episodes too.

I'm surprised CW hasn't done this with Vampire Diaries/Originals yet.