Re: Scarlet Witch,Quicksilver,and Polaris
You can already tell the difference in the roles the characters would have with the casting. Singer just hires Evan Peters, who isn't a scrub or anything, but he's no up and coming young actors like Aaron Johnson and Saoirse Ronan.
2014 - Captain America: The Winter Soldier | The Amazing Spider-Man 2 | X-Men: Days of Future Past | Guardians of the Galaxy
2015 - Avengers: Age of Ultron | The Fantastic Four | Ant-Man
2016 - Captain America 3 | Batman v Superman: Dawn of Justice | X-Men: Apocalypse | The Amazing Spider-Man 3 | Doctor Strange
TV - Agents of S.H.I.E.L.D. | Agent Carter | Daredevil | Luke Cage | Iron Fist | Jessica Jones | The Defenders
TV - Arrow | The Flash | Gotham | Constantine | iZOMBIE