So based on that Shade 45 interview, the current Shady Records album lineup is going to be Yela, Slaughterhouse, BME, Eminem. Based on various different interviews, this is when the albums look like they are lining up:
Q1 2015 - "Love Story" - Yelawolf
Q2 2015 - "Glass House" - Slaughterhosue
Q3 or Q4 2015 - "TBA" - Bad Meets Evil
Q4 2015 or later - "TBA" - Eminem
It seems likely that each of the four albums will drop at the beginning of each quarter of the year, considering Love Story and Glass House are confirmed to be Q1 and Q2, which are pretty close to each other, and would leave Shady Records desolate Q3 and Q4. That means Bad Meets Evil either Q3 or Q4, probably Q3, and then Eminem, who, if releasing an album Q4 could probably have one more album left, however if he waits until the next year, it would probably be his last album.
TL;DR: 2015 is the year of Shady, with an album dropping each quarter.