http://whatculture.com/tv/how-i-met-your-mother-finale-5-reasons-why-ted-and-robin-end-up-together.php

How I Met Your Mother is about to enter its ninth and final season, with all twenty four episodes being set at Barney and Robin’s wedding. Well, supposed wedding. Sure, they’ll probably get married because this is TV and we like to go out on a happy ending. But that doesn’t necessarily mean that they’ll stay together. Why?

Ted. Ted is obviously going to factor in somewhere. There are unresolved feelings between he and Robin that are bound to come up. Everyone is focused on Ted’s relation to the mother, overlooking the possibility of him interrupting Barney and Robin’s upcoming nuptials. It will happen, and here’s why:

I do not buy Barney & Robin as a couple. As friends, they have chemistry, but not as lovers. They're too much alike.

And despite this tease with the new "mother" character, I'm still not entirely convinced that Ted and Robin won't end up together in the end.

Remember, this show likes to throw twists and curves into the plot, so we'll see what unfolds as the season progresses.