That's actually pretty plausible...
I don't remember any other "that jutsus", but snooping around the internet hints that it's an Uzumaki clan unsealing technique that lets Naruto gain more access to the Kyuubi's chakra or powers. Since Naruto's already formed a good relationship with Kurama, there's no disadvantage if he were to do that. Props to Kishimoto if he does this.