It was possible that features like Indev's finite maps would have returned in the cancelled game mode Zombie Siege. Inside the Beta 1.9 pre-release 6 jar's "title" folder is a file named 'earlyplayers.txt' that contains the account names of the supposed '1000 first paying alpha players' of Minecraft. According to a Reddit post by Jeb, the names were originally going to be displayed in the credits, but the list wasn't 100% accurate, so the idea was scrapped.[1]