a game of American football played each year between the winners of the two leagues (= groups) in order to decide which the best team in the country is
De facto
existing in fact, although perhaps not intended or accepted
Mishap
bad luck, or an unlucky event or accident
Elaborate
containing a lot of careful detail or many detailed parts
Halftime
a short rest period between the two parts of a sports game
Evolve
develop gradually
Arena
a large, flat area surrounded by seats used for sports or entertainment
