So...
I bought the game and started it up and made the mistake of entering the wrong e-mail address by accident. Not sure what I was thinking at the time, but the mistake was made. At no point are there any prompts asking me if I was sure I wanted to do this or if X was the correct e-mail address. I realized there was a problem after it asked me to change my Origin ID so I tried to back out of the process. Unfortunately, the game was so kind as to create an account for me already before I was even done and even went so far as to link my NID to that account (even though it wasn't even completed yet).
I tried deleting all of the Most Wanted data files on my Wii U's HDD, and yet the game still thinks I'm using this crappy e-mail address as the game has now been linked to this so no amount of information changes will help me get this removed. So I contact EA customer service to get it fixed and I simply ask them to delete the account so I can start over from scratch. After a long time waiting and chatting, it was brought to my attention that once the game is connected to an e-mail address there is no way to change it. It's a one time deal and deleting the account would make the game totally unplayable. In essence it would destroy my game.
I was told that the only way to fix it now was to call them (on the phone...from Japan) as phone support was the only group who could do anything and even that was attempting an account merge. Now, I'm not the best software engineer out there, but I know that the account system they have setup is one of the crappiest things I've seen in a long time. Why the hell would it link your NID to an account without asking if you want to do this first? Especially considering that there's no way to change it once it's done. All they've done is turn what was and should have been a relatively simple fix into something time consuming and frustrating. I just don't understand why these guys would make more work for themselves and not give players an "out" before committing.
Now I'm pissed off and have to find a way to call them in an hour or so. More waiting on the phone... Ugh.
So guys be VERY careful about setting up your account.