Has their been an announcement on what the next Hextech skin might be?

Hextech Annie and Soulstealer Vayne have been skins for awhile now, I am just curious if anyone has any information on if there will be another hextech exclusive skin? As someone that doesnt play either Vayne or Annie I have been sitting on my Gemstones patiently waiting for the next skin to be announced but I havent heard anything about it. If they arent going to be making anymore I might as well cash in on one of the skins because both look appealing. Thank you for your time.