NetherRealm Studios released a gameplay trailer for Sindel, who is slated for an early access release for Kombat Pack owners on 26 November 2019. Several signature traits are back with somewhat retconned story apparently.
Mortal Kombat 11 roster is getting enriched with Sindel as soon as 26 November 2019 for the Kombat Pack owners while the full release is coming on 3 December 2019.
While her powers and the former status in Edenia are bound to make some people call her a scream queen, she couldn't be any further from the meaning of the word. When fear is at the door, Sindel is the one who's knocking. She demonstrated as much when she effortlessly dispatched the hero posse in Mortal Kombat 9 until Nightwolf sacrificed himself to stop her.
Relegated to NPC position back in Mortal Kombat X, Sindel is finally returning as a playable DLC character. According to the trailer, seen below, she retains most of her signature traits as well as the moves. Using hair as means of tossing or entrapping enemies, naginata that was her weapon of choice in Deception and even stiletto stabbing will be featured in the undead queen's move set.
Her default appearance seems to be that of undead but as you can see on the image above, as well as in a section of the official trailer, there will be cosmetic options to display Sindel in her form before dying...again.
Based on the intro dialogue with Nightwolf, it appears that Sindel is still hell-bent on destroying Earthrealm, despite originally being a benevolent leader of Edenia and evil only in undeath due to Quan Chi's magic. Her personality may have been retconned or some remnants of Quan Chi's influence remains but it appears she is not on friendly terms with the heroes of Mortal Kombat.