"The Reason Why The Three AoV heroes Are Not Permanent"

Chinese server had a voting wherein they're asking everyone which global hero should be added next

Heroes are as follows:

Luara, Butterfly (Old Arke abilities), Florentino, Lorion, Annette

Luara won the voting, Butterfly almost did, then Annette

Florentino and Lorion got the lowest votes

So this could go two ways:

Altman promised a hero voting so we'll get one of them this year after S15 (they said in the dev talk that they will gather data to balance them to HoK gameplay)

they'll stay for casual modes for the whole season or maybe until KWC is finished on August just like how they're pickable in 10 vs 10 mode in Chinese server

or

They're completely limited and won't be coming back any time soon due to balancing issues, instead we'll have to wait until Annette is released in Chinese server (3rd place among the voting)