CBS (ended 2014)
|Hadn't noticed that Ted had made that comment about aunt Robin and uncle Barney. If that turns out to be true, that would mean that Ted gets married to Barney's or Robin's sister ...|
I knew it! It was so obvious that Robin and Barney share a profound and tender affection for each other and that eventually they would be drawn together.
For the sake of the series, I don't think that they will immediately enter into a relationship now that they have (at the very least) made out. But, the see of their love has been planted. They will, of course, have to hide their attraction to each other for Ted's sake, and that will keep the characters more or less in their established story arcs, as well as providing new dramatic fodder for possible "very special episodes" of HIMYM.