I think the big problem here is that throwing the news here out right at this moment is really bad business decision since it just cause unrest and needless worries and affect player spending
Some will just get anxious about whether or not the game is there after Part 2 is over and hesitate on spending.
Imo the game won't shutdown but Nasu will move away from it and DW will have a new writing director in charge of the game
And in future years Nasu will return occasionally for one or two chapters / events that he like