There could be various interpretations of a 'Brock Lesnar Christmas Story'. Maybe it's about how he celebrated Christmas with his family and friends, if he has any unique traditions. Or it could be a humorous take on Brock Lesnar during the holiday season, like him trying to put up Christmas lights and getting frustrated because they keep getting tangled, all while still maintaining his tough - as - nails persona.
Well, without more context, it's hard to say exactly what the 'Brock Lesnar Christmas Story' is. It might be a story that combines his tough - guy image with the Christmas spirit. For example, he could be involved in a Christmas charity event in the story where he uses his strength to help out, like lifting heavy things for a Christmas fair setup or something. But this is all speculation.