Still nothing on android anyway. I'll just take you word for it. My thinking is whatever they're planning must be enough to replace a raid because they must be concerned that the playerbase is droppping off and this really needs to keep people playing until the next DLC comes out. I imagine most people bought the season pass for these two DLC's pretty early on, but with the next one they can't rely on people preodering it before they reach the end game. Also the picture they used on the reveal showed a giant servitor inside what looks like a cell so I think we can assume that the Prison of Eldars will include bossess too. Doesn't seem very sporting sending guardians in to kill things that are already locked up though!