In a self perpetual way, Mattel has stated that they can never change a color scheme or an accesory due to a figure being too far along in production when shown to fans while at the same time stating that a figure can never be announced for legal and other reasons when it begins its production a whole year before it is actually unveiled.
So why couldn't Mattel simply put up polls asking basic questions, not specific to a figure, but relatively known to its fans? For example, Evil-Lyn could have had a simple poll stating "Female skin - yellow or purple?" or Keldor "acid burned face or cape" without actually having their names released and let a lot fans relatively happy when the final product was made. What about just having a basic poll up stating "When/If we eventually get to 'character name here', we would like to see 'option A, B, C, D here'.