after beating the ender dragon let's have a spot where you have to make the entire credits that would be awesome or let's do something with the dragon egg, like hatching it so you can go to sky world. Where you make an army to fight some god ( any god really preferable made up gods to not offend anyone or their religion) and when defeating the "god" you start to make world then galaxies and finally the universe . And if you want to go farther let us make a... dimensional traveling machine to travel to other AU in which the possibilities are endless and the creative machines begin.
you are thinking like we are.