I think his current skin is uninspired, unoriginal, and I would love to see an all new design
Well you might need to point out what you find great about it. But because I'm a pessimist, I kinda doubt they will. For me, anyway, I liked Pantheon because it was a cartoon version of an actual panoply. What scraps of information we've gotten seem to be playing up the magic space parasite route, at least that's the vibe I got from the frankly terribly designed spearhead they showed in the teaser image.
But on the plus side, he probably won't have that diaper anymore. It was stupid when 300 did it. It was stupid when Riot did it. And it remains stupid to this day.
That or his abnormally huge feet.
As long as Naked-Except-My-Hat-And-A-Thong Pantheon stays I'll be fine