War of the World Goliath, an animated movie slated by Heavy Metal magazine as ongoing series has had a troubled birth. Now re-imagined as a complete movie this Steampunk/Dieselpunk story finally saw a limited release in 2013. Which means we might start seeing this out on DVD soon. The concept does look very interesting a world-wide defense force raised on the tech from the first Martian invasion, although like you I do remember how poor Heavy Metal animations usually end up being. The trailer is below and if you want to learn more click here.