However, Carter Bays revealed that the couple will not have a baby by the next season.
"A stork isn't going to drop a baby in their laps in the season premiere," he said. "[Parenthood] is going to be a big chapter in their lives. There are a lot of steps ahead."
Bays added that he intentionally included a reference to Marshall [Jason Segel] and Lily [Alyson Hannigan] having children during a voiceover earlier in the season.
"Every now and then we like to, in a roundabout way, paint a clear picture of who they are at the time that the show's being narrated from," he said. "And yes, we felt like it was time to tell the audience that Marshall and Lily also go on to have kids."
Bays also revealed that Robin's popstar alter ego Robin Sparkles will return when footage of the Canadian variety show mentioned earlier in the season surfaces.
"It's inevitable that we're going to see what that show was all about," he explained. "That's something to look forward to next season."