Dang it. Akenhaten wasn’t married to his sister. Nefertiti was his cousin. It was Tut who married his sister. But whatever. Their family tree is a stump.
They don't just point to Orion, if you look at the locations of a lot of the pyramids in Egypt, they replicate the constelation almost perfectly (with 4,000 years of stellar drift)
And King Tut’s daddy, Akenhaten, tried to get rid of all other gods but Ra and make Egypt a monotheistic society. He failed. Also, his wife was his sister.