I think it was more there was no incentive and she had already been ripped from the books once what's to stop it from happening again. It took a long time for all those writers and editors to disappear and then for storm to slowly be reintagrated. Either way disney has the rights now so it gives the character more power. Disney could literally so a cartoon princess movie with storm and it would work. They are not going to let that get away and they aren't going to waste it on the next bp movie unless it's to up it's profile for when shuri takes the mantle.