The Art Market Monitor poses some "unanswered Polaroid questions," citing A.D. Coleman's ongoing series of posts on the sale. (He's up to Update # 13.) Coleman links to a letter from the lawyer for the bankruptcy trustee, which says that two federal courts have "authoriz[ed] the sale of artwork free and clear of any and all liens, claims, encumbrances and interests of any kind whatsoever and the transfer of good, clear and marketable title," so I'm not sure where the (legal) controversy is.
Earlier post here.