After watching the promo and SJKN video, though I don't want to predict I can't help it..
Anna seeing nakku's real face, will turn evil.. he would lock her in the room..
Nakku sits there thinking of what might happen if dutta comes and sees her.. here I think there is a chance that it might be nakku's dream .. only the part where dutta comes and sees nakku..what we saw in the promo..dutta seeing her and the later part [whatever it is]..
Subbu comes to know of anna's intentions .. she wanting to help nakku will meet her somehow and nakku may tell her story to her.. subbu would help her put back her color..
Dutta comes and in the fight between two, I think at the end it is subbu who will kill anna.. this is very much possible.. otherwise we don't have any significance for the role of subbu..[she is feeling guilty already and anna's intentions will add up to this ]
Subbu would be playing a main key role here in the relationship between dutta and nakku…she would help finally in uniting nakku with dutta..
So nakku' color will not be revealed now to dutta because of subbu's help.. and the revelation may happen once they return to PN..
Please share your thoughts…