Complex sentence: After being first announced in June 2007, the initial set of products were launched in 2008, based upon two of the three earlier films ("Raiders of the Lost Ark " and"The Last Crusade").
Split into simpler sentences: After being first announced in June 2007, the initial set of products were launched in 2008. Initially, sets were based on two of the three earlier films ("Raiders of the Lost Ark " and"The Last Crusade").