My own curiosity for future reworks and their skins...

So one of the reworks finally announced that i myself am truly excited for is Galio . He's currently one of the very few mid laners I can actually play at all and I myself enjoy him a bit. Now seeing him on the rework board has me wondering for one curiosity on one topic... Legendary Skins.

Galio will be the very first rework that actually has a very high value skin that also changes his voiceover, and I have to wonder one thing and I'd love to hear some Riot response or something on this, will he be keeping the old VO on his Gatekeeper skin, or have a brand new VO for the skin along with the rework? And will this idea be kept for future reworks that also have legendary or even ultimate skins?