Nearly one month after the trailer debuted, Warner Bros. has released the first poster for Grudge Match, featuring Sylvester Stallone and Robert De Niro going toe-to-toe in the middle of the boxing ring. The story centers on two retired prize fighters who set out to prove that they still have what it takes to be a champion, 50 years after their last title fight. Whose side are you on? Sylvester Stallone's or Robert De Niro's?