I think it's far more likely that they will attempt to implement a system that only requires surnames. This would be a level playing field. At present people like Neymar, Fred, Willian and others have a significant advantage, but to require their full names would be counter intuitive in trying to find a balance
A surname only system would rule out many players. Also, there are many players with the same surname. In the MB quiz, I asked for full names, or first names, or surnames. That way, everyone's covered, not matter what name they are known for.