Young Avengers#1, New Avengers# 11 and Avengers Vol. 4 #12
Young Avengers#1 is the first appearance of the team of the future. They are not what they appear to be. New Avengers# 11 is the first Ronin appearance. Avengers Vol. 4 #12 cover depicts Tony Stark wielding the Infinity Gantlet! Inside they battle The Hood for the Infinity stones.