Multiple end portals

In the event of an end update, the end portals should also be reworked. Instead of being sent directly to the main island, you should spawn out further and have to find your way to said island. To have this work while still being compatible with old worlds,  I'd recommend having a new, 2nd type of end portal, that will be the new one people use to initially go to the end, how this specific one works would depend on the content of the update, but this one should be what is first used, and what sends you out to the islands. After defeating the dragon the portals in the strongholds would be enabled to be activated. Doing this would give more buildup to the dragon while still allowing for backwards compatibility.