Ok people, here are the answers you want:
As can be read in the wikia, the Divine science story pack HAS been released at http://abstergoindustries.com/securefiles/ as RAR files with the story artwork, videos and text. Also, the DDS program has been SHUT DOWN by Abstergo as part of the in-game world's story, so Project Legacy is most likely officially finished, dunno why they did not leave the notification there.
The Erudito page of the wikia points to an ARG of sorts, the Abstergo mailbox, so if you're bored with project legacy you can try going through that.
It is sad that such a great game stopped being supported but at least Ubi released the material of the last story pack for our viewing pleasure, they should have made that more visible at least!