The interview says "in 2018" not "in the end of 2018". Seems like mmo-champ is making more on more mistakes on listening to those interviews, its not the first time since blizzcon.
Besides just because it took BfA to release 12 months it doesn't mean Antorus is supposed to be raided for that time. They are going to release 8.0 2-3 months before BfA and after that no one expects anyone to raid Antorus seriously.