Very good thoughts. What you say makes a great ammount of sense, but alas, since I have not yet read the books that would aid me in discussing this with you, I cannot offer a whole lot of new ideas. I can say that I got a very similar idea from what I
have read.
When Gandalf came back I at first thought that he might not have died in the first place, but later it became clear that was not correct. So I wondered why Gandalf was allowed to come back. Your theory makes sense...at least to me.
Which brings me to another question which I don't think is really worthy of a whole new thread, so I will put it here if you all don't mind.
When Gandalf fell with the Barlog, I became confused when he ended up
on top of a mountain. I have a lot of quickly concocted theories which I will not embarass myself with by posting them here.

So my question is; how did the battle end up on a mountain, and what was the name of that mountain?
blessings!
~*Laialthriel*~