Multiple "Knights" Groups in ST?

So I know it's not strictly canon, but I was wondering if you think we'd ever see the Zakuul Knights or any other non-canon Force group appear along the other Force User groups we're seeing in the ST and just Canon in general.
Off the top of my head -
Canon Groups: Jedi Order, Sith (both Rule of Two and Non-RoT versions), Inquisitorius, Knights of Ren, Dagoyan Masters (http://starwars.wikia.com/wiki/Dagoyan_Masters/Canon), and the Witches of Dathomir
Non Canon Groups (that have popped up Post-Legends): Knights of Zakuul, Revanites/Order of Revan, and Voss Mystics

We know the Jedi Order believes in the Light Side of the Force and uses that for the good of the many, to paraphrase; while the Sith use the Dark Side and all that entails. The Knights of Ren, other than the assumption that they use the Dark Side of the Force, are a complete mystery.

The Knights of Zakuul are from the Star Wars: The Old Republic MMORPG (massively multiplayer online role-playing game) new expansion, Knights of the Fallen Empire. The Star Wars wiki states that they use the Force to enforce justice and they seem to use lightsaber-pikes from the in-game footage I've seen.
http://starwars.wikia.com/wiki/Knights_of_Zakuul
While they might not appear in the ST, they might in the one after that or any of the Anthology Films. Do you think they'd even work in the Canon? If not, why? If so, how and where would you like to see them? Thanks and let me know!