To many cooks in the kitchen is an understatement. Today, Latino-Review broke the story that Marvel has hired Gabriel Ferrari and Andrew Barrer as production-only writers to help revise Ant-Man. Now while they are new writers they are not rewriting the already revised script that Adam McKay has helped revise since Edgar Wright and Joe Cornish originally wrote. These writers are simple going to be at the set to help revise the day-to-day script pages which is common practice in any Hollywood studio film.
Ferrari and Barrer have also written a draft of a rebooted Sabrina: The Teenage Witch for Sony which caught Marvel's attention.
Ant-Man hits July 2015