WHOA! Just calm down! Breathe... Ok, now retype all that and fix all your grammar mistakes...
Ok sorry, but you should really take your time when you type. That goes for everyone.
You have me very intrigued now though because I didn't think of that. I'm going to have to replay the game again... Thanks

That's very possible, but then that means Raiden didn't take part in Taven or Daegon's story at all... At least I don't remember him at any other time than when everyone thought he went to the dark... er... side. But I guess if you're right then perhaps Shang Tsung found a way to trap Raiden somewhere so that he could morph into him.
I'm liking your theory and can't wait to see how it holds up.
Now just work on those typing skills