I'm not exactly chomping at the bit for a Queen Marlena but if and when the Queen appears my vote goes for the Filmation red-headed astronaut. It gives a little bit of leverage to her command capabilities rather than being just a born monarch.
On a side note, a red-headed Marlena would produce a bit of a conundrum for me. Given that Randor is a brunette and the brown-haired gene is dominant, if he were to breed with a red haired Marlena (I believe that red hair is also a recessive gene but I could be wrong) then 2 blond haired offspring would be impossible. Let's say that Randor's hair genetic make up is Bb (where B is the dominant brown hair gene and b is the recessive blond hair gene) and Marlena's hair genetic make up is rr (where r is recessve red hair gene) then using a genetic matrix there would be 50% chance that their children would be brunette (Br) and 50% percent chance they would be red-haired (rb). I think the red hair gene is dominant over the blond hair gene. But like I said, I could be wrong. I got kicked out of gene splicing class for my heretical theories before we finished hair color genetics.
But if Marlena was a brunette with the make up of Bb and Randor was also a Bb then there would be a 25% chance that their offspring would be blond (25% BB, 50% Bb and 25% bb). Or maybe I'm just dissecting it too much like all my vivisection experiments.
I still prefer red-haired Marlena...