FairyGoatmother

Even if one wants to discount the Christians who will find this change scandalous, there are all the secular fans that fell in love with Aslan in Disney's version of the Lion, the Witch and the Wardrobe to consider.

Aslan is a larger than life figure, and while the lioness makes a terrifying huntress, she doesn't cut quite the same dramatic figure as the lion. It is the lion that has captured humanity's imagination for millenia.

Lions are more visually dynamic!

It seems fullish to change. I think too many will miss the glorious mane.