I think the threadstarter meant 100% writing and producing by MJ at least, if not other things like, arranging, playing instruments, mixing, engineering, etc. (IMO, he'd have something to do in each of these areas besides writing and producing, tho. Just that it wouldn't be 100% him) Of course, it's hypothetical to think any one artist could make his/her album all by him/herself. But, I believe he can do his thang without outside help in terms of more musical parts of album making which is writing and producing. Just as the artists that DuranDuran mentioned, he's on the level of them.