Barney and Robin have just gotten together on How I Met Your Mother.

The sitcom's season premiere this week will focus on their coming out party as a couple.

But show creator Carter Bays has bad news already for fans of this couple: their relationship won't have a happy ending. That's just one snippet of what Bays told TV Guide in a recent intervew. Here are a few others:

On Barney and Robin: Robin's suddenly in the position of being the expert on relationships, which she certainly hasn't been historically. But she's Lily compared to Barney. It's not going to be easy for them. It's not going to be happily ever after. Barney has to change his lifestyle to fit into the couples' world. I think he sees himself as the Luke Skywalker of single people who's getting seduced by the Darth Vader of relationships.

On The Bro Code: The Bro Code will be expanded upon. There's going to be another book in addition to the Bro Code that we're going to unveil at some point. It's Barney's Playbook. It's his picking-up-girls playbook.

On Ted: Life's going to be a little easier for him this year. Ted will be dating, but there are no big relationships coming up on the horizon for him. We've created this whole new exciting element of [narrowing the mother to] one of the 3,200 enrolled in the grad department at Columbia. I can't say whether we'll meet the mother, but she'll be a part of the show in a way she hasn't before.

Before the show returns tomorrow night, get caught up with our collection of How I Met Your Mother quotes!

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.