One of the players in my group wanted to change his character because it didn't turn out the way he wanted. The rest of the group don't know this, and i thought about surprising them with the help of the player.
I was thinking to set up his old character up against the rest of the group and then have the new character come into the fight and rescue them. I don't want to split the group or anything. Only to have a bit of fun along the way.
So all you experienced players: is this a good or a bad idea? Is there anything a should be aware of before doing this?