What? those $200 million where the entrance ticket for sony to do anything they want. do you really think they are pure angels, wanting the best for michael jackson? they're out for the money, which isn't necessarily bad, in fact, making money isn't bad it all, but:
if their plan is to release a (fake) song, then that's the plan, you won't be able to ever stop them. if they want to release an album where 3 out of 12 tracks are disgusting fake tracks, you can't stop them. they THINK putting an imitator on a few tracks will have no one worried, just a few 1000 hardcore fans on some forums. but 99% of all the other people, who are less familiar with MJ's unique voice, will take it as him. the other 1% are regrettable, but sony can afford that.
they're already in their board room adjusting their revenue forecast, happy about having the album ready for dec. 14 - thanks to the handy cascio tracks, which were already in beautiful, finished form, meaning acapella, strangely just 1 track of each song existed, but why would a music industry giant wonder about this, this is the most normal part ever, especially if it's michael jackson. So in the end the tracks sound good enough, there will be only a few doubters and that's better than having to need some more time, because other songs may have needed longer to be worked on.
this way sony can reap the profits thanks to christmas time. a great christmas gift!