Jade compares Ludmoore's controlled Portal to a Stargate.
Yan Lin at one point says that "winter has come"; Hay Lin tells her she should stop watching that show.
Alistar Tharquin appears to be based on Alistar Thorne.
When some rebels are executed and Servantis gives them a chance for last words, it plays out like the Season 6 episode where Jon Snow executes some Night's Watch mutineers.
When Harold Hale betrays Jackie, he pulls a Littlefinger and points out he warned Jackie not to trust him.
After learning that Jade is the new Ben Shui, both she and Irma compare her to Aang.
Several of the magic artifacts which the Dark Hand tries to steal in Chapter 17 are based on Shen Gong Wu. And when of them gives its user stretchable limbs, he says that he's like Mr. Fantastic.
Caleb's Berserker Form is based on the Cursed Seal.