I think the timeless child might be related to the hybrid from season 9. Just a hypothetical

Im kinda going by the idea of ashildr technically being a timeless child as she was you g when given immortality so it kinda fits her🤷‍♂️

Chibnall hasn’t appeared to want to build on any of Moffatt’s whoniverse so far, so I can’t see him calling back to ashildir... he’s trying to freshen things up a bit

I can only think of Davros. He was a kid in one of the episodes, and we all know what he did.

Does anyone remember Omega and Rassilion? Perhaps they know of this. It was them who created and perfected the eye of harmony which is the sole power source of every TARDIS. What if this Timeless child was thier first experiment to use the eye for time travel or if this child is older...the progenitor of the Time Lord Race? Locked away like Omega was in a pocket universe due to the Time Lords rebellion against a God-Like Figure. Taking it's power to be or act like God's themselves. Like 10 (David Tenant) once said. "Sometimes a Time Lord just lives to long..."

a childhood friend of the doctor and master they forgot, one of the founders of gallifrey or even a weapon, just like the moment

My theory is that doctor is the timeless child the time lords wipe her memory of what happened

The Doctor of a dark, unavoidable future in which one or more of her companions and/or her must die

Something old

Something new

Something borrowed

Something blue

The Timeless Child is a TARDIS in human form because there's a possibility that the TARDISes created the Time Lords for them to believe that they invented time travel but "oh" how wrong they were.

@ZAREELGLU Omigod that would be brilliant! But I don't think Chibnall's that smart, sadly.