ohh yes! she is gonna have some rockets behind! on the sketch drawing i have made some, but this looks rad! Also her arms will have turbines, on the elbow part i drew them :')
Nice job! The poses are really dynamic and I'm loving the colour choices you made ^^ (ALSO those gauntlets look bad ass, especially in motion!) on your sketch fab model; it doesn't look like you've enabled 'shadeless' by default in the settings - I recommend doing it as it makes diffuse only models look much better!