This maxes out a BD25 and covers the majority of what people want to see. In terms of the extras:
TV Specials
    The Secret of Star Wars
    Evolution of the Lightsabre Duel
    Sky Movies Special
    Jimmy Kimmel - 23rd November 2015
    Disney Channel "On The Set"
        Preview
        Finn
        Rey
        BB-8
Digital Exclusives
    BB-8 at JPL
    Dressing the Galaxy
    Inside the Armory
    The Scavenger & The Stormtrooper
    Tunnel Standoff
Online Featurettes
    The Women of Star Wars
    The Sound of a Galaxy
    StarWars.com gives Lollipops to cast
    Rey
    Legacy (Comic Con Brazil)
    Stunts
    The Story of Star Wars
    SDCC 2015 Sizzel Reel
    BB-8 from Sketch to Screen
    Behind the Scenes in Abu Dhabi
    Hard Hitting Questions for Cast & Creators
    John Williams on Scoring Episode VII
Production
    Holochess
        Tippett Studios
        Tested - Making Stop Motion Puppets
        Tested - Making the Holochess Sequence
    Visual Effects
        VFX Guide 207
        Variety Artisans
        Visual Effects Breakdown
        Visual Effects Splitscreen
Appearances & Interviews
    Appearances
        Daisy Ridley Q&A
        JJ Abrams & Lawrence Kasdan DGA Q&A
        Press Conference 1
        Press Conference 2
        European Press Conference
        The Power of Storytelling Panel & Q&A
    Interviews
        DP-30
        Official
        Collider
        ScreenSlam
Trailers & TV Spots
    Trailers
        3 x 2D, 3 x 3D Trailers
    TV Spots
        TV Spot #1
        TV Spot #2
        60s TV Spot
        "5 Days"
        "All the Way"
        "Secret"
        Finn
        "Bring It Home"
It’s about 11 hours of content.