I'd love that too, especially carrying over to next years game.
NBA2K has an incredible My Player mode that has lots of interaction.
If The Show could copy a lot of those aspects (fake Twitter accounts, interviews, etc), I'd be all in.
I love Career Modes so I'm hoping The Show 13 has something like that in store.
If I could add 1 more wish, it would be to invite a friend to compete in the same world as your RTTS player.
You don't have to be on the same team either.
Imagine logging in after work to find out your buddy just went 3/5 with a HR and 4 RBI's to take a lead over your stats?
OR, having to play a game against your friend's RTTS pitcher?
Or compete to see who will make it to the major's first?
That would be awesome!