In a report over at Variety, Transformers 2 is one of the films mentioned as under threat from the possible writers union strikes which are expected to take place in Hollywood next year. When talking about Dreamworks, Variety report that "Not on the pre-strike list is "Transformers 2," a sequel that is still being written. Labor talks will determine whether the visual effects-heavy film makes its projected June 26, 2009, release date."
The article also includes a mention of the summer 2009 release of the live action G.I-Joe movie. "Paramount, pleased with revisions done by scribe Stuart Beattie, has officially set a Feb. 13 start date for G.I Joe an event-sized film that went from a pre-strike question mark to an anchor of the studio's summer 2009 release schedule. Paramount is in talks with up-and-comer Sam Worthington to star, and the studio was down to working out any scheduling overlap with Fox, which has Worthington starring in the James Cameron-directed Avatar".