In one way both the promos match... like nakku planning to reveal her face on the wedding day which is supposed to be on 13th..it also says nakku kholegi apna raaz.. so its clear till now that it is nakku who will do the FR..
now about the rituals, they may skip the haldi rasam and not show it at all..
or as shown in the promo, nakku is wearing the saree in a way how they wear during the haldi rasam.. so i doubt just before this rasam nakku decides to tell the truth..usually this halsi rasam happens on the previous day to the shaadi..
again the promo says '13th Nov ko hogi DUTTA AUR NAKUSHA ki SHAADI..' but it is not clear from this, whether shaadi will happen after FR.. if it gets cancelled and dutta takes time to accept nakku i am for this track..
i can stand a 3rd time wedding rather than seeing dutta accepting nakku immediately after the FR and rushing into marriage.. if that happens, dutta character will be completely butchered.. will it not mean that he took so long to fall for dark nakku but in an instant accepted fair nakku..
i know he is already in love.. but under normal circumstances anyone will need time to accept such a major revelation and that too before entering into a marriage.. because he is so deeply in love it would be more difficult for him to accept this.. though whatever explanation nakku may give will not be convincing enough... as to why she didn't trust him or why she went ahead with all the events and reached till the last minute of the marriage though there were many opportunities for her to tell the truth..
or another possibility is, if we go according to the sequence of the written promo, what if shaadi happens first and soon after the shaadi nakku reveals her secret.. but this will be very weird and i don't want to even think about this possibility..