Without getting too many imports since there are no limits is to control the level of the league's salaries. If you can keep the league at a low enough rate, then you don't end up with lots of foreigners in your domestic international leagues. I've found around 500k salary caps and making the NBA lucrative enough that min sal guys would rather ride the NBA pine than go overseas will keep your legends from going overseas unless you absolutely want them to do that.
Currently have a dozen foreign leagues running and it's been nice for them to develop their own histories over time with only the occasional Americans coming into to ruin stuff.
|