Four downloadable content packs are in the works for Metro: Last Light, starting with the Faction Pack in June. It and the Chronicles Pack will introduce further story content, followed by "a unique solo challenge to Metro veterans" with the Tower Pack and the Developer Pack, which offers tools intended for "creative players."
Deep Silver and 4A Games have a $14.99/£11.99 Season Pass that packages all four add-ons on sale now. Additionally, the pass includes a semi-automatic shotgun rifle called the Abzats. PlayStation Plus members can save 25 percent on the pass between May 21 and June 4 in the US, and May 22 and June 5 in Europe.
"Artyom's story may have been concluded in Metro: Last Light, but there are other characters with stories to tell, some familiar locations that fans of the Metro series wanted to revisit, and some new challenges that 4A wanted to explore," said 4A creative director Andrew Prokhorov. "Since completing the game we have been working on these new stories and hope to release them throughout the summer."
While I've only just scratched the surface of Last Light -- so far, so good -- this sounds like a nice, varied content mix. I'm hopeful!