If they add a color then I would want the dark green available on the explorer.
Some minor option changes may occur in MY '14, but really all the changes in '15 will be a result of the complete redesign of the mustang (if Ford doesn't wait a wait to create the new GT500). After that there will be small changes from year to year or every other year until the next major redesign.
Yah of all colors it's a bit ridicolous you can't get a Shelby or Boss302 in that dark highland green - classic mustang color. It would be like Porsche not having silver available on their new lineup.