Since Fairy Tail is "supposed" to appeal to young boys it's likely nobody else will become a real couple by the end of the series, which is kinda sad because it means that Hiro Mashima will basically let the genre or fans run his story instead of himself. It's also why almost all the female characters (new ones, too) have large chests, it's because he doesn't want to make "his own" characters but conform to what the genre wants from him lol. It's like the SNK author all over again. Hajime Isayama apparently had this violent and sad ending but he wanted change it so he wouldn't upset all of his new anime fans who had grown attached to all the characters.
Also lol I think I'm the only anime fan who hasn't seen any Dragon Ball.