You're not the only one!! It looks amazing. And that's saying something, because when I saw the trailers for Assassin's Creed 3, I was skeptical. The character looked boring, the story didn't seem great, and the highlight of the trailer was always "Oh boy, you get to kill British soldiers!!". Despite the trailers for Assassins Creed 3, I still bought the game, and I was right! Conor was nothing compared to what an amazingly interesting character Ezio was - Conor was boring, I didn't care for his story - I had to force myself to finish the game.

However, seeing the announcement trailer and details for Assassin's Creed 4, I am massively excited for it! Everything that was wrong in the 3rd game looks like it's fixed in the 4th. There's more focus on ship combat (which was great!), a new setting, an amazing looking character. Edward (Conor's grandad), looks like he'll be quite an interesting character to play as, and I'm glad Ubisoft took the direction of abandoning Conor's story.
I had a bad feeling for Assassin's Creed 3 ever since I saw those trailers, but I can safely say, I have no bad feeling for Assassin's Creed 4!