Empire has a interview with Lauren Shuler Donner, producer on every X movie to date. They discuss Wolverine 2, X-men First Class, Deadpool, X-men Origins: Magneto.
Looks like Wolverine 2 will use the Claremont/Miller Wolverine mini-series as a template, which is a great place to start. Looks like First Class will skew for a younger audience. The Deadpool movie will ignore what was set down in the Wolverine movie. Magento could be good.... we'll see.