if there is i wonder why only halibel there when buckbeard invade,
and also there is a chance that kubo is actually involved himself in the anime production, since the scene where it show halibel past is major for the series i doubt the anime studio will just randomly decided to do that without the author permission,
but still this is kubo we're talking about he can just pull out vasta lorde out of nowhere with some BS explanation like the quincy conceal them self for 2000 years.