There is a new show debuting in Dockside this year: Down by the Riverside, performed by the new Rivertown Ramblers troupe. It is described as a jazzy music show with a mix of old gospel songs and renditions of some more modern (well, 70's and 80's...) music.
It seems like a replacement for Cajun Connection that ties into the whole "rivertown" theme. A neat concept on paper, but we'll see if the actual show is decent. Sometimes these types of shows are pretty lackluster karaoke-esque displays, but SDC has a good track record of doing them OK.
I think it's interesting that they are putting together new troupes to replace their old stalwarts like the Sons of the Silver Dollar and Cajun Connection. Those groups had fans and followings that I'm not sure this kind of production is going to achieve. They definitely can't replace the Homestead Pickers, but the way things are going it wouldn't surprise me if they tried eventually.