First off I want to say that I have really been looking forward to playing with her and was hoping Sindel would be released in September not late November, very disappointing.
As far as what I am hoping for with her gameplay style , I would like her to be very reminecen to Supergirl from Injustice 2. An air dash like the Kryptonians had would be similar to a flight mechanic. Horizontal and diaginal downward air fireballs and a on the ground fire ball projectile. Her scream could also be similar to Supergirl breath in injustice 2 with an enhanced version granting hit stun for more attacks. I'd also like some good normal strings with pop ups for combos and make her scream plus on block with plus strings for pressure and maybe minor frame trapping . I don't want her to just be a pure zoner with minimal combo potential like she was in MK9.