Another spawnpoint at the begining of the stage

[YinYin]

technically the spawn point cannot be changed

However you sure can grab and relocate players, that will only work once they stopped blinking though.
The better option would be to have the still blinking character react to a stage object (best case a zero placer) within the very first active frame. So you are doing pretty instant repositioning inside any character meant to be spawned elsewhere.

The character may still flash up in the original location briefly.