legal reasons aren't an issue. I think the legal issue idea sprang up because of what 2K did. But 2K did that because they didn't want customization so deep that people could recreate the NFL. They did it not because of legal issues, but because they didn't want to "upset the NFL" (as one of the Thomas brothers said) and weaken their position to get the NFL license which was due to expire shortly at the time. Little did they know, the NFL and EA were poised to renew, which they did. It was a total loss and the gamers were the ones that got screwed by that decision... but it's ancient history now.
I'd have to believe that the BB team learned from that incredibly boneheaded mistake made by 2K and wouldn't dare repeat it. It's much too absurd to repeat, so I consider it a non-issue at the moment.