First. Jay Garrick mentoring Barry. All of us comic nerds might have shit there pants at This. As Barry is trying to "fix" his mistakes. Jay is the reason Barry is dealing with all the guilt, he might have been the reason we didn't see Barry create a new "Flashpoint"
Second: Nods to Wally as Kid Flash.
Throughout the episode we see Barry mentioning the "Flashpoint" to his team we see him make interesting looks at Wally maybe we see him suit up as Kid Flash once again.
Third. Mirror Master
As the episode draws to a close, The Rival is in Iron Hieghts cell. Dr. Alchemy adresses Edwards failure. And we see a metal arm grasping and presumably killing Edward (Totally would have used his last name but don't wanna find it, cause I'm in a rush to beat those articles be Matt and Ror, I'm coming for you my friends). What's interesting it that the are is metallic maybe class possible a mirror ;) I think this confirms that Mirror Master and his accomplice Top are working for Alchemy.
Thanks for the clicks Josh would be proud!!!