Unigamesity has a article for Dragon Age: Inquisition that talks about romancable NPC's.
More information.Dragon Age Inquisition will most likely come out before the end of the year but unfortunately, there are still many things to be unveiled, including the full companion list and the romance options. So far, BioWare has announced Varric and Cassandra’s return and unveiled a new female companion, Vivienne. Will they be potential romance options or will they be part of the friendship-only group? It’s a tough question but it can be easily predicted based on previous tendencies. In the last two games, parties always had eight members and four romance options, which most likely mean Inquisition will follow this trend.