Ancient ruins on 1.20

It has been confirmed that the 1.20 update will add archeology elements, so I think it would be a good idea to add ancient ruins as one of the new archeology elements.
Ancient ruins can generate a lot of suspicious sand, and very rarely, the new block "Ancient Tomb" can be buried under the suspicious sand.
Touching the ancient tomb may spawn nasty mobs, "ghosts".
If you have any other good ideas, let us know in the comments.
Thank you for looking at my ideas.