Here are some coincidences that I found funny. They are just coincidences, so they might not actually be connected.
Emerald’s design resembles Pink Diamond from Garnet’s flashback. Hair with exactly 5 main hair spikes shaped like a fire and a triangular upper body.
In Stevonnie’s dream, Pink Diamond resembles Padparadscha. They both have roundish shoulder pads, short whitish hair, lush lips, gloves, and when you look at that fabric on Pink’s hips, there’s a white part on the edge, just like Padparadscha's ribbon on her back, her dress, and her chest. Pink’s shoulder pads also has a white square.
When Pink punched the glass, she used her right hand, and that’s where Padparadscha’s gem is located.
They are just coincidences tho…