Meh. I almost think that the troll and skellie ships were really a way for LEGO to "test the waters" (groan) for the Pirates relaunch. I'm pretty sure that, now that we have Pirates, we can expect fewer ships in Castle, and personally I like it that way. Two large ($60+) ships is enough for the current Castle theme, I think.
I collect LEGO themes that start with "C." And Pirates. I call them "Corsairs."