So, I recently got Godzilla the game, and have unlocked all the Kaiju.

But recently I started playing the online pvp mode (even though the game is pretty empty, sadly) and there appears to be three locked characters. (shows up as ????????) I was just wondering if anyone knew what this was all about, is it a glitch? (Like the shadows of buildings staying) or are these the result of some unreleased DLC?