From their announcement:
As a wise veteran of Small World you now have a chance to re-write history. Small World – Tales and Legends introduces Event cards that can dramatically change the storyline of each turn during the game. Some events may have small consequences, while others are nearly cataclysmic in their impact.
Each of the 54 large-format Event cards introduced in Tales and Legends feature a unique illustration and are organized into 6 different themes, each with its own unique flavor. The cards are also rated by their impact on the game: Little Lore cards have only a minor effect; Tall Tales have worldly consequences; and Lordly Legends are guaranteed to turn your Small World upside down. At the beginning of each turn (except the first), a new Event card is drawn and put into play. You can learn more at the Tales and Legends web page.
Small World – Tales and Legends requires a copy of the original Small World board game and is compatible with the other Small World Expansions. Pre-order now at the Days of Wonder Web Store. It is expected to be available for shipping, and at better game stores throughout the world, in early July.