Scorpion is from Mortal Kombat, he is the specter of the netherrealm, and the storyline is from Mortal Kombat 9 (2011)

Black Siren is the earth 2 Doppelgänger of Laurel Lance who showed up on earth 1 in episode 22 of the flash

Your walking to through the streets of Gotham a month after Batman’s death and you see and Bat looking figure on top of the building next to you in the ally

Ahim from Gokaiger: Gokai pink 5,6 and has a crush on you but she doesn't know you have a crush on her too