I just heard someone of interest talk about expansion and the cities mentioned were numerous. I think there is no shortage of cities. Montreal, Mexico City, Las Vegas, Charlotte, Portland & the great city of Pasadena, Maryland. Okay, having a little fun with the last one but there are no shortage of cities. I think this person (I wish I could remember) stated that both Tampa and Oakland need to be resolved first before expansion however.
I have brought this up a few times. It scares me to think about but Camden Yards is a treasure so that gives me hope. However, the Orioles need to get their organization structure functional to prevent a move-friendly owner from buying the team. I doubt the Angelos family would move, I can all be guarantee that would not happen. Say what you want about the Angelos family, they wouldn't move the team under their ownership IMO.