yay, i'm super excited! i'm so happy it's coming on this early in America. I'm not complaining but it kind of makes me wonder why they are doing it so early.
I like the name Marcus but...I don't really think it suits Giishin. I'm happy they kept the rest of the names though. And I really don't like "Spiky Ear Pichu"'s name. It sounds just...awkward :/
As for Arceus' name...I originally pronounced it as 'arch-E-us'. I like it better than 'ar-see-us'. Though, 'ar-see-us' sounds so much more natural since it's the Japanese way of pronouncing it.