Summary of components
Pic 1:
2* plasma cannon
Landing feet *4
2 main engine fans and 4 sets of 2 secondary thrusters
Front and rear ramps
2 side doors (it's not clear if these are land raider sized, they look too wide for a Rhino, but you'd assume they'd make it compatible with the FW doors)
Missile covers and some other hull plating
Pic 2:
Main engine tubes
Sides
4* Blood angel icons
4* Grey Knight icons (I think)
Pic 3:
Topside vent (can be repositioned)
4* missiles (tips only)
2 assault cannons
2 lascannons
2 multimeltas (barrels only)
2 H bolters (barrels only)
[It looks like the weapons are designed to be interchangeable without magnets]
Typhoon missile launcher
12 Hurricane bolters (unclear where these attach)
Topside turret and gunner/pilot
Tail section (still looks a bit small to me but it has an underside fin which probably helps
Pic 4:
Clear plastic windows
Pic 5:
Main body and wings
Things I can't see:
Attachment for valkyrie flying stand (presumably its built in)
Dreadnought grapple
Any special grey knight weapons