Well, I watched the gameplay and reveal at Ubisoft Forward, and this game looks quite good in my opinion.
Gameplay seems to borrow both from Assassins Creed and Zelda (and similar games). The rifts with challenges seem similar to shrines in Zelda and the overworld seems to contain way more environmental puzzles than Assassins Creed. But the action gameplay looks a lot more like Assassins Creed than Zelda. They didn't show it, but I expect a big skill tree.
Art style is fine for me. And I love greek mythology, and it seems they do it justice.
What do you think?