Apologies if this has been brought up but I've had a thought about the Cersei/Jaime deaths and couldn't find any other relevant threads.
Obviously Brans visions are now confirmed as a mix of both past and future. The wildfyre at KL is proof of this.
What if the shadows on the wall vision of 'Jaime killing the Mad King' is actually Jaime killing Cersei in the future? Or better yet, Cersei killing Jaime?
Given the prophecy so far coming true and Cersei's mental state deteriorating I think she could try and kill both brothers (Tyrions en route to KL with Dany), in order to halt the Valonqar part of the prophecy prior to its reckoning.
