Complex sentence: Renner first made an uncredited cameo appearance in "Thor" (2011) and later played a larger role in "The Avengers" (2012) and'(2015) as well as reprise the role in the upcoming film' (2016).
Split into simpler sentences: Renner first made an uncredited cameo appearance in "Thor" (2011) and later played a larger role in "The Avengers" (2012) and'(2015). He is reprising the role in the upcoming film' (2016).