Based on what a couple people have posted they were asked in a survey question about future destinations, Civitavecchia was a possibility with alternating Eastern and Westen Med itineraries:
7-night Eastern Med: Civitavecchia, Messina, Kusadasi (Turkey), Athens, Heraklion (Greece), Civitavecchia.
7-night Western Med: Civitavecchia, Genoa, Marseille, Barcelona, Palma, Sardinia, Civitavecchia.
Although I personally would like to see sailing from Venice, but that maybe would mean only Eastern Med Itineraries... I think that would be the bigger demand anyway. After doing a 10 day Med this past summer, I would really like to see them stick with longer 10/11 day itineraries in the Med.