I think it will always be Sledgehammer 44. I feel like it's more of a reference to the year the armour made its debut, than to the year the story takes place. It could get pretty weird otherwise when we get to Sledgehammer 2008...
I'm kind of torn. I loved Jason Latour, and I wish they'd kept the same artist on the series, because its always that much more fun to have a continuing artist. But Laurence Campbell is also great, so I can't but be excited for what he's got in store for us.
I really hope Jason Latour will be back in the Mignolaverse soon. I really enjoy his stuff. And he really clicked with that World War II stuff.
I wish Latour had stuck at it as well - it still feels a bit off when the main series jumps artists, so I was hoping the Sledgehammer line would just stick with the one. Give it its own distinctive look. Laurence Campbell is fantastic, so no complaints there, but I would still prefer the consistency of having one artist take ownership.
I hope the change in art styles doesn't affect the tone of the book too much for me. Latour's work was key to that in the first two-parter. Campbell's is a much more refined, realistic style. The armor should look pretty cool though, I'm thinking.