I'm going to see the front of that costume!
Mm, from what leaks I can find~
Lose the woven overcoat and wool midcoat.
Ribbed Sleeves remain, but the ribbed tunic's been replaced by one with horizontal stitching and a mandarin collar with vertical stitching. The old XCoser v2 collared tunic's a half-decent match, if you're not RAWR 100% ACCURACY - ribbed sleeves, ribbed tunic, ribbed collar, all in one coat. I don't know if the newer v3 tunic still has the collar, but if it does, go that way - they apparently improved the shoulders' range of motion.
Standard Kylo belt/gloves/pants/boots.
Vader-style cape made from a leather-like material. No clasps - it just kind of sits over the rest of the costume.
No neck seal or helmet yet shown.