Last year Barry Allen played by Grant Gustin finally entered the Speed Force on CW’s The Flash. This small scene showed Easter eggs for much of the Arrow-verse including glimpses at The Flash Museum, Killer Frost on Earth-2 as well as DC’s Legends of Tomorrow all assembled.
:: Spoilers Ahead ::
On tonight’s episode a slew of DC Easter eggs were also shown when Barry, Harry and Cisco entered the Speed Force to actually travel to Earth-2. They included a futuristic Green Arrow, 1990’s Flash TV Series, Gorilla Grodd and the first glimpse of Melissa Benoist as Supergirl from the CBS show. Other cameos included Jonah Hex from a future episode of DC’s Legends of Tomorrow and lastly a ring from the Legion of Superheroes:
We also later on in the episode heard that Atlantis is an actually place on Earth-2. With Earth-2 Barry Allen (for some reason) having Diana (Wonder Woman), Bruce (Batman) and Hal (Gren Lantern) on speed dial from the Justice League:
Tune in next Tuesday to The Flash as he returns home from Earth-2 on The CW