Ancient City portal opens "a fresh minecraft world for you to explore"

I think this idea comes from playing my old (now 11 years old) survival world. However you activate the portal, it could allow you to travel to a completely new minecraft world *If this isnt in the realm of technical possibility then id suggest linking the portal up to another within the same world*. This will allow players to obtain new world generation within thier existing limits of their expansive world theyve spent hours and time creating. Make this new world be the exact same thing as starting a new minecraft world but obviously keeping your current inventory while transitioning. Allow the player to find its way back (maybe craft new item or utilize the recovery compass or somthing. Maybe they are only allowed limited time within the new realm? Maybe they are being chased by entities in the other realm that directs them back to thier home realm? Maybe everything is the exact same and minecraft functions the same except the color scheme is shifted? Activating new "realms" from other ancient cities could allow you to freeze time within a specific minecraft updates allowing you to go through old activated portals to revisit past updated terrain generation? As of now I have to travel over 10k blocks to find new generation. Not bad but starting a "new world" within my existing world is somthing I find very valuable and may solve a number of concerns.