Arrowverse Fans React to "Elseworlds" Part 1

The Arrowverse's "Elseworlds" crossover officially kicked off tonight, and it looks like fans have a lot of thoughts about it.

Spoilers for tonight's episode of The Flash, "Elseworlds Part 1", below!

The episode saw Barry Allen (Grant Gustin) and Oliver Queen (Stephen Amell) realizing that they had switched identities, after Dr. John Deegan (Jeremy Davies) manipulated reality. In an effort to prove their true identities, the pair went everywhere from Central City to Smallville, and tussled with a familiar DC Comics foe in the process.

While "Elseworlds" has really only just gotten started with this episode, fans have been pretty darn excited by what they saw. Here's a round-up of some of those responses.