How likely is an Umineko localization, with the updated art, like Higurashi?

I'd have to say that it depends on how well Higurashi does. The initiative to do the updated art is a bit of a risk and a first for Mangagamer, so we'll have to see how the response to it is once it goes on sale. It's certainly been a learning experience. I'm lead to believe Umineko's translation isn't as big of a problem as Higurashi's, but I'm sure there's still improvements that can be done.