If you guys payed attention to the other videos, They were working on Kha'zix before rengar. But Rengar popped up and they decided to release Rengar instead. If you read Rengars Lore obviously it lead to Kha'zix. The reason why they're probably lagging on the release is because he has no art work for the mecha skin. To all those people who say Kha'zix is like Rengar, obviously you've never played Rengar nor Kha'zix. Rengar has a heal and a passive jump and, while Kha'zix already has a jump in his kit. If you guys took the time and actually try out the champs then you'd know that they're clearly not similar.