• Three new heroes: Captain Alexander, the Prophet, and Duke Magnus
• Three unique "Heroic Tactics" cards for the new and existing heroes, with these cards forming a separate Heroic Deck next to the player's regular deck
• Advancements that can be built on conquered worlds, including Cosmic Terraformers, Wormhole Generators, and Dark Energy Power Cores
In addition to this, Stronghold Games is working with BrokenMyth Studios to release Core Worlds Digital, a digital implementation of the game that's scheduled to debut at the same time as Core Worlds: Revolution. From the press release:
Finally, Stronghold is overseeing the release of a Core Worlds web comic on Inkbot.Net, with the first ten-page story debuting in Q4 2014 and introducing characters and events of the Core World universe as well as potential plot lines. Every six weeks after that, a new five-page installment will be published, with feedback from readers being taken into consideration for the content of future chapters.