Ok, my final prediction before they're unveiled:
BW announces this as a GB2 line, using mostly the original sculpts, with improved paint apps. The tan flight suits with 84 logo, plus the GB2 dark suits with GB2 logo will be included with each figure. Ray and Winston with come bundled with slime blowers, and the only new sculpt will be Winston with his GB2 hair style and no moustache.
Alternatively, The slime blowers will be an exclusive pack-in with the full set, which includes a new Slimer figure based on his GB2 appearance, and the painting of Vigo and/or the renaissance style painting of the GBs. Possibly just a reversible painting with both images on either side.
Following this they'll soon announce Ecto-1A.