The hill you see here is the outside of the exhibit complex - there are four enclosures being built behind this (at least one is apparently complete). There's an artist's impression here: Yorkshire Wildlife Park Foundation
The total size is meant to be 10 acres (a typically understated YWP exhibit! ).
Despite much hype about trying to 'rescue' a bear from Mexico alongside this, it will almost certainly be EEP animals that come - most likely spare males (they're not planning to breed here for now).