First, Mat is alive because Egwene dreams of Mat standing naked and bound with his spear thrust across his back behind his elbows andsince this has not happened, Mat must be alive. Mat will be taken as a prisoner of the seanchan and since Mat is an unusual prisoner(he possesses a power wrought blade with two ravens on it and a medallion that deflects theone power) he will be brought to a person in power for interrogation. One of Egwene's dreams has Mat "wrestling with a Seanchan woman who ties an invisible leash to him". I believe that this leash is just a development ofaffection between Matt and the Seanchan woman. I think that Mat's interrogatoror the person overseeing the interrogation will fall in love with Mat. I am not sure whether the two ravens that alight on his shoulders are the tatoos of ownership or if they are two different Seanchan women who are interested in young Mat(like Perrin's falcon and hawk). It should be noted that Jordan mentioned the two ravens on Matt's shoulders in the same statement that he mentiones Perrin's two birds. This could be coincidence or a hint that Mat's birds are like Perrin's. Since Mat is supposed to tie the Seanchan to Rand it only confirms my theory that the woman that Mat meets is powerful. Who could commit the entire forces of Seanchan except a woman of the royal blood. Therefore, based on this I think that the DNM is the Empress' daughter, Tuon.