an eventual cult classic would be an understatement 
(ROOT (S (NP (DT an) (JJ eventual) (NN cult) (NN classic)) (VP (MD would) (VP (VB be) (NP (DT an) (NN understatement))))))
(ROOT (S (NP (DT ) (JJ ) (NN ) (NN )) (VP (MD ) (VP (VB ) (NP (DT ) (NN ))))))