*SPOILERS* for the questline contained in this link.
https://www.reddit.com/r/DestinyTheGame/comments/3vsvuz/how_to_get_the_sleeper_simulant_available_today/

I plan on trying to get mine tonight, or just the first mission, or at the very least checking to see if I have the first mission available to me, and if not I'll be running patrol on various planets attempting to find any missing DVALIN relics.