In a short article, Gamers Alliance Strategy squeezes a little more out of Scott Campbell, project lead for M3:TWA. It's short, but here's a nice quote from the intrepid designer:
Myth has a deep and heroic story about the struggle between light and dark. It has massive battles, political intrigue, ancient prophesies, and sinister betrayal. Each level that is completed, more of the story is revealed, drawing the player into the game, and urging them towards the last battle and the cinematic ending. Heck, even I want to play this game right now!
Most of the other info is basic explanation of the gameplay and which is nothing new to those familiar with TFL and Soulbligher. Check out the whole article here.