I wouldn't mind that, in fact I'd actually like that a lot. As it stands I don't do flex que, but I'd definitely hit Gold in it if the reward was an extra victorious skin.
Likely it'll be somethings stupid, an ugly ward or summoner icon.
And since Riot doesn't know what players like, the Skin itself will probably end up being Victorious Sion, fUrgot, Anivia, or some other champion that people don't like or just generally, a rather unpopular champion.
The best contenders for a popular, and well-liked Victorious skin, would be Victorious LeBlanc, Victorious Ahri, or even Victorious Veigar would be better than any of the other weird shit they put up. I wouldn't personally mind Victorious Xayah, Victorious Ashe, or even Victorious Jhin personally, though it seems unlikely.