nice to see that their is a thread for this, im not a light novel reader but i love spoilers and here is my speculation by watching both anime so far, i started believing that AW and SAO are in the same universe and timeline due to episode 22 of AW stating that the Nerve Gear from SAO is an old technology of their time so this is what i speculated so far
anyone see the resemblance or family connection? kirito and asuna are the parents of kuroyukihime?
just by googling around i found out im not the only one who think first about this too
Accel World (AW) timeline starts at 2047
Sword Art Online (SAO) timeline starts at 2022
the year gap is 25
kirito is 16 in SAO
asuna is 17 in SAO
kuroyukihime is 14 in AW
so according to those numbers kuroyukihime was born on year 2033
and asuna at that year 2033 is 28 years old
kuroyukihime's avatar is full of swords and is fast like asuna and kirito are very good at
kuroyukihime uses vopral strike on episode 23 of AW and i heard in SAO that ability is use too
kuroyukihime behaves like a boss and smart just like kirito and asuna too
kuroyukihime's hair color and eye color resembles the mixture of kirito and asuna too
SAO and AW have same author and both story have same concept of virtual reality game
and kuroyukihime's real name is still a mystery so maybe this will be a big revelation later?
and another one i can add
what if Kirito and Asuna did not end up having kids together? they split up for some reason
i mean is it possible that Kirito's child is Kuroyukihime while Asuna's child is Haruyuki?
Kuroyukihime as child of Kirito has already been speculated
but what about Haruyuki? he has same hair color as Asuna?
or that does mean that Haru-YUKI and kuro-YUKI-hime are actually are both siblings of Kirito and Asuna?
any expert light novel readers here that can deny or strengthen my speculation?