brash, nice to see another "keep the surprise til ESB" member here. There are many of us. I know there are many PT problems, but this is the most difficult task perhaps in all of the prequel ideas.
Mainly it comes down to the payoff. Is there enough of a payoff for the audience at the end of the PT if you hide Anakin's fate?
Is it that we think Anakin died a tragic death? Could work.
It is all in how it would be presented.
edit: bingo, in your radical edit are you saying young Boba would become young Vader in TPM?
Speculating and moving the puzzle pieces is sometimes the funnest part of these edits.
I've long wanted to make Jango a mandalore somehow or include the mandalore's as part of TPM but haven't figured out a way with the available footage. There doesn't seem to be enough footage available.