It is no problem to have a team with a trademark/copyright teamname, but generating a real name person is problematic. I don't get the logic behind that, but as we all don't know american law, we probably should just accept that.
Größter Knecht aller Zeiten aka His Excellency aka President for Life aka Field Marshal Al Hadji aka Lord of All the Beasts of the Earth and Fishes of the Seas aka aka Conqueror of the Buzzerbeater Empire in Europe in General and Austria in Particular