Just a quick one to start with - expect better quality pictures later as its really busy and people are damn rude!! Lol
Mechanicum Red Book
Mastadon Tank - this is HUGE!!
Lord Commander Eidolon!
Dark Angel Upgrade Kit
Blood Angel Upgrade Kit
White Scars, Blood Angels and Dark Angels are all in the next book. They will have legion rules but no characters or legion specific units.
Book 6 will cover shattered legions and will focus on players creating own narratives for small scale engagements.
Future book will be Thramas and Signis Prime (mirroring the old Blood Angels/Dark Angels codex)
Prospero may not even be book 7. They need to ensure that they can produce the entire range quickly and efficiently and not keep people waiting. To create all the models needed for Prospero would take about a year.
That's all for now :)