I'll update this as news periodically comes in, obviously.
January:
-S1 reveals that he has sent some beats to Eminem
http://hiphop-n-more.com/2013/01/exclusive-interview-with-symbolyc-one/2/
-A concert for Glasgow, Scotland is announced, set for August 20th
http://www1.sk-static.com/images/media/img/col4/20130128-153300-179478.jpg]
-50 Cent discusses "Champions" ft. Eminem, a collab that will be on Street Kings Immortal
http://www.youtube.com/watch?feature=player_embedded&v=YGIVp-vppQ4
February:
-Rumors circulate that Eminem samples singer Jamie N Commons for upcoming single
http://www.thesun.co.uk/sol/homepage/showbiz/bizarre/4781068/Eminem-does-UK-a-favour-by-sampling-Jamie-N-Commons.html
-Needlz submits beats for Eminem's album
http://www.hiphopdx.com/index/news/id.2%20...%20um=twitter
-Paul Rosenberg reveals that the album will be released post-Memorial Day (May 27th)
http://www.billboard.com/articles/columns/the-juice/1538589/eminems-next-album-due-post-memorial-day-exclusive
March:
-Eminem was spotted at a restaurant nearby Interscope Records in Los Angeles
-Eminem will be performing at the Pukkelpop festival August 15th
http://sphotos-b.xx.fbcdn.net/hphotos-snc7/c223.0.403.403/p403x403/1658_10151335512504249_1554261193_n.png
-Dr. Dre calls into Big Boy's Neighborhood and says that Eminem is finishing up with his album
http://www.youtube.com/watch?feature=player_embedded&v=bC67fLUbHzs
April:
-It is announced that Kendrick Lamar, Tyler the Creator, and Earl Sweatshirt will be joining Eminem at his France concert
https://sphotos-a.xx.fbcdn.net/hphotos-ash3/541412_435822626507312_1121979358_n.jpg
-Big Sean posts some pictures of him and Eminem together, strongly suggesting that Sean is a feature on the album
http://instagram.com/p/YlZpfDj2tT/#
May:
-Eminem is seen in the studio with Chris Rock
June:
-A new freestyle of song is announced for July 9th
http://hiphop-n-more.com/2013/06/tony-touch-the-piece-maker-3-return-of-the-50-mcs-album-cover-track-list/
-Scoop DeVille submits beats for Eminem
http://www.mtvhive.com/2013/06/10/scoop-deville-britney-spears-travis-barker-eminem/
-The new song or freestyle issued for July 9th is revealed to be titled "Symphony In H"
http://soultemplemusic.bandcamp.com/album/piecemaker-3-return-of-the-50-mcs
-Symbolyc One confirms that he has worked on Eminem's album
http://www.hiphopweekly.com/2013/06/17/hhw-exclusive-guilt-trip-producer-symbolyc-one-talks-yeezus-magna-carter-and-new-group-with-lupe-fiasco/
-Full Symphony in Hate song
http://rapradar.com/2013/06/18/new-music-dj-tony-touch-x-eminem-symphony-in-h/
July:
-Eminem will be performing at the G-Shock Event in Yew York, possibly with new music
http://reachnyc.com/eminem-set-to-perform-at-g-shock-anniversary-party-in-nyc/
August:
-"Survival", a new song from the album, premieres.
http://rapradar.com/2013/08/14/new-music-eminem-survival/
-Eminem announces his new LP is called "MMLP 2", releasing November 5th, 2013; Rick Rubin and Dr. Dre are executive producers
-The new single, Berzerk, hits the airwaves