For all we know Obito was dead for a long time during the manga and now its finally revealed that he's alive so what's to stop Kishimoto from revealing that Rin is alive as well. I think that Kakashi, Obito, and Rin are going to have some kind of crazy reunion but without Minato. This would drive Kakashi crazy because not only did he think his best friends were dead and mourned their death's for basically his entire life, but they are close friends that once fought on the same team as him that are now fighting against him to take over the same ninja world that he vows to protect until his last heartbeat.