Iga simply screwed up everything. I mean, was just make few good Castlevanias with 100 years resurrection and Belmonts with only a few of deep story like SOTN that difficult??
Now, if IGA's out (We don't have any information) Cox had to fix all those horrible plot hole, so, he made the right decision for starting, start a new concept in a story presummably placed at the coldest episode of the chronology; if he goes right, let's hope he will fix the entire chrono.