Hadn't heard that about a Colombia port being missed, but I would assume if it's part of a Panama Canal itinerary, it's probably Cartagena. There are a lot of reasons why ports get cancelled or skipped, not necessarily related to crime or civil unrest, but that's possible, too. I've been to Colombia a couple of times, but only to Bogota, never to the coast, and it's been a while. According to friends who moved back there, it's much safer now than when we were there in the '90s, but unrest can happen just about anywhere.
I was thinking more of the Eastern side of S.A., since that is more accessible for a Trans-Atlantic, Brazil, Uruguay, Argentina. It would be arriving at the beginning of the cruising season for the Southern hemisphere. I have no idea if they're considering any such thing, but a girl can dream! 😍