Originally Posted by Great Expectations
Is it accepted that Jon survived the attack?
I would not say this about anything when it comes to GRRM. That being said, it seems somewhat likely that Jon is not dead, or will rise again as Azor Ahai. I could go into more detail, but if you are really interested in that, I would suggest reading this essay from Tower of the Hand that spells out the case for Jon as Azor Ahai: