Yes necessarily, the show is called "How I MET Your Mother" not "How I Married Your Mother". They meet, they fall in love, its over. It will make for a funny ending though
I still have my money on Barney marrying Robin. There was a scene last night of Marshall drunk in what looks like Atlantic City with Barney on the phone looking shocked...my guess is that is Robin calling him telling him she loves him. Why would Nora want Ted to talk to her at the wedding? They get married, Ted meets his wife, then my guess is we speed ahead to an even farther future where Ted is telling the story at his daughter's wedding or at his anniversary or something. I mean the kids who played his kids are a little old at this point