What is perhaps most interesting about this trailer is that it may give some insight into Arrow‘s 100th episode.
The story sounds very similar to the Batman: The Animated Series episode, ‘Perchance to Dream,’ where the Mad-Hatter creates a very similar dream world for Batman — one where his parents are alive and he is to marry Selina Kyle.
crossover event begins Monday, November 28 with Supergirl @8pm on The CW, and continues with The Flash at the same time on Tuesday, Arrow on Wednesday, and Legends of Tomorrow on Thursday.
From the looks of things, this is shaping up to really be “the best team-up ever!”