Given what they have tried with xbox one games, this will have pretty much all task monetized in some way and may offer a subscription service.
It will be interesting to see what happens with Sony versions, as at present they are published by Sony and I cannot see that continuing. Would Sony allow MS into their approved publishers list? (If such a thing exists)
A few points been raised about kids loving it, which is certainly true, they don't however buy things. They watch endless youtube videos of people with the DLC but they have no real interest in it themselves, they are happy with what you get for the entry fee for the most part.
Any drastic changes could kill the franchise so whatever Microsoft do, could be very risky.