but it would be easier to just add a SEness to poison and a resistance to ice
adding a whole new type to the chaos of 17 types would just make it more chaotic
there are many games that do just fine with five or some even four
Here's my thoughts on the light type, if it happened it would bring a whole new challenge/aspect to the game and it's series, I personally don't think it will happen, but if it does it will be confusing to decide what it's weaknesses and its strengths are, I don't think GameFreak is up for that challenge yet, but if they do figure out its weaknesses and strengths and add this new type it will change the game entirely.