It doesn't look like much, but I spent hours fighting with GIMP and various wad editing utilities trying to make the sky depicted in this screenshot look good, specifically in SRB2's palette, which did not help matters. Incidentally, it still doesn't look right to me! But, you know, whatev.
There'll be a few other fancy changes to the level pack, but I don't want to spill it all here. I will state that the maps have been moved to the extended numbers, starting at C0, so I guess if you're into that kind of thing then you'll love the next release.