Ok so I downloaded the demo and tried it out for a bit. Baseball is not really my game, however the game seemed understandable.
But the main thing that took my attention was the ability to create Fictional Leagues.
I would just love it if something like this where possible in Football Manager.
Not only would it be easy to create fantasy leagues, but you could also add a whole new league if you felt for it, or more divisions to existing leagues.
For instance, Third Division in Norway is probably never going to be included in any football game what-so-ever, but with a feature like this I could actually add it myself.
Offcourse some changes has to be made. You should have the ability to state how many (if any) teams get relegated/promoted etc, to what league they will get promoted.
This would take FM to a whole new level in my opinion. There should also be the possiblity to share leagues, so that anyone can download leagues made by others. And perhaps even other changes, to rules and lots of other stuff. Ideally everything should be possible to alter, every little rule...
This would probably create a whole new scene with lots of interesting mods to download.