I myself am going to make 5 or so types of dungeons that will be like this it will have easy medium hard expert notch and jeb xD and you press a button ex: pressing easy will make pistons cover up the random mob spawns the dungeon will be easier and random drops from anything to boats to diamonds to swords to bows, then you will start out with leather gear and things like that stone sword and some pork chops bout 3-6 and step on some pressure pads and the dungeon doors will open up and you can go in and for each difficulty there will be about 100,000 different combinations of dungeons and i can only for on this every other week starting this Friday... also each dungeon will be about 200-500 blocks :D there is someone that made it on a small scale o-o ill put a video link im just making it in my own way but it will be something like this......THE VIDEO IS NOT MINE