About the title, if they don't want to use "Age of Apocalypse" because transformers and Avengers are already using the "Age of " for their films.
How about "X-Men: The Apocalypse"? Its simple yet striking.
X-MEN: FEMME FATALE
Storm | Phoenix | Rogue | Psylocke | Polaris | Dazzler
Emma Sage Kitty Jubilee M Husk Marrow Cecilia Blink Lifeguard Stacy