writes "Christopher Tolkien has completed the last book of J.R.R. Tolkien from notes left from his father."
The ultimate question is how much of a quality difference will there be; for instance the difference between Dune
and Dune: House Atriedes
is a pretty big gap. But in my experience, Christopher Tolkien has always taken a good, cautious approach when it comes to his father's work so here's to hoping.