Classic biblical archeology.
Fundamentalists (including JWs) will jump up and down saying that there is now proof that the biblical timelines were correct and that Jews were expecting a messiah and here is more proof that Jesus is the promised one.
The rest of the world will say- "Oh- so being resurrected in 3 days was a typical thing in 1st century religion- so the gospel writers needed to include that reference in order to give the story legitimacy."
Meanwhile- all we really have is a rock with a smudged phrase on it.