Nice to see the idea being bounced around at least. BSU-FAN has a good point, if there is no 2k13, a 'total conversion' mod just might build up some steam.
I've found myself hooked on Ken Burn's Baseball this spring training. And a baseball game set in the past... Cobb, Ruth, Gehrig, Walter Johnson, Grover Cleveland Alexander.... i could go on and on... the hole idea just sounds so damn fantastic!
For all those interested, I can't recommend this highly enough. A must for any baseball fan!
http://www.imdb.com/title/tt0108700/