A lot of this is probably true. Mark did use the Elisha story updated for Jesus. I don't know if we have any evidence of Jesus as a man. There is evidence he was a pre-existent celestial being. The first mention was Paul where he was already in spirit form but Philo mentioned a similar ac-angel who fits the description and is called The Branch.
The idea is that Matthew added the guard so people wouldn't say the body was stolen, to lean on the resurrection thing.
That was the point of sons/daughters of God, to go through some passion and get salvation for followers.
"Romulus, like Jesus, was a mythical person historicized who was claimed to be a pre-existent celestial being who became incarnate, died, and returned to life to rule on high. Scholars are coming to agree now that this indeed
influenced the development of Christianity. Time to get on board."
"“Paul’s letters show the belief,”
Hurtado writes, that Jesus “had been ‘pre-existent’ and was the agent through whom all things were created (e.g., 1 Corinthians 8:4-6 [and Philippians 2:5-11]),”
and indeed this means “the idea was already known and uncontroversial in early Christian circles within the first few years after Jesus’ crucifixion.” And these scholars all document the existence of angelic or other celestial creatures who already existed in Jewish theology that Jesus was believed to have been. This is no longer controversial. Take note."
It’s the growing consensus in Jesus studies now that the first Christians believed Jesus was the incarnation of a pre-existent celestial being. Even Bart Ehrman has gotten aboard this trend (see Bart Ehrman on How Jesus Became God); and even Larry Hurtado, who was irrationally against...
www.richardcarrier.info