Loved that episode...alot of easter eggs and things you may not have noticed.
http://www.ign.com/wikis/the-flash/C...eos_-_Season_2
Spoilers:
Episode 2.13 - "Welcome to Earth-2"
As Barry traveled through the portal to Earth-2, he saw glimpses of various heroes from other live-action DC shows. Among them were Melissa Benoist's Supergirl and John Wesley Shipp's Flash. A Legion of Super Heroes ring was also shown.The fact that Supergirl appeared in the portal seems to confirm that she lives on a different Earth from Flash and that the multiverse will come into play when the shows crossover in March.This portal also offered glimpses of two characters who will be appearing on DC's Legends of Tomorrow later in its first season - a Dark Knight returns-inspired Green Arrow with a cybernetic arm and Jonathon Schaech's Jonah Hex.Earth-2 Barry Allen apparently has several big-name DC heroes on his speed dial, with listings for Hal (Green Lantern), Bruce (Batman) and Diana (Wonder Woman).*Executive Producers Aaron and Todd Helbing*said that these names are "Just Easter eggs right now."Barry's phone also had a speed dial listing for "Eddie," suggesting Eddie Thawne is still alive on this world.Earth-2 Barry bought his parents tickets to visit Atlantis, which isn't the first time Aquaman's undersea kingdom has been mentioned.While he didn't appear in the flesh, it seems that Leonard Snart is the mayor of Earth-2's Central City.This episode seems to discredit two of the more popular theories about Zoom's identity. Earth-2 Joe West is now dead, and Earth-2 Henry Allen appears to be a loving husband and father. That said, the show could just as easily be trying to misdirect viewers with these twists.