Make the Ancient City Portal Functional

I think the mysterious portal-like structure found in Ancient Cities should become functional. The Ancient City is already one of the most mysterious and dangerous places in Minecraft, and the huge portal-like structure makes players wonder what could be hidden behind it. I would love to see it become a gateway to a mysterious new dimension or area connected to the Warden and the Deep Dark. The portal could require rare materials or a special ritual to activate, making it a major late-game discovery. The new dimension could contain unique blocks, mobs, structures, resources, and lore connected to the Warden. Please give this mysterious structure a purpose instead of leaving it as decoration. It could become one of Minecraft's greatest secrets.