I dont believe any metaphysical predestination idea about Jesus, I dont beleive he was fated to die from when he was born, anymore than anyone else is. That is to say he wasnt fatalistically destined to be sacrificed horribly.
Most of the "explaining" of why Jesus died how he did was done after he was dead, or after he died and was ressurected and ascended if you believe that account, so there must have been a point, or many points, when he and his followers believed it could or was all playing out differently. I think so anyway.
Would it have had the same signficance or the relationship between God and man been different had Jesus not been executed and had just lived his life, taught the message from the scriptures that he did and died an old man with grey beard in his bed? I actually dont think it would have been any different, we each owe God a death, I believe that God being incarnate and experiencing that process is/was as important in the reconciliation of God and man, as his dying horribly as he did.
That's the important thing, and I think that its understood in Jung, and was also widespreadly understood in central European thinking (Karen Horney wrote in their diaries about a teacher she had a crush on growing up explaining a popular idea about everyone possessing a "spark" which was God in them but Jesus having more of that "spark" than anyone else) at a time.