In the expansion, players will be tasked with hunting down a particular sect of pirates, the Guristas, by hunting through a null-sec system for the prized data. CCP will be dangling eight new ship skins as potential rewards for a successful search.
Kronos will also include a rebalance of 38 ships, a "heap" of modules, and a total overhaul of the drone weapon system. CCP stated that the two themes of the expansion's balancing are the ascendancy of pirates and mercenaries and advancements in industrial technology.
CCP also just posted the patch notes from Kronos, so give them a look!