Just got an update on the releases of all Final Crisis books:

Final Crisis Secret Files for January 2nd -unchanged
Green Lantern #36 for January 2nd
Final Crisis #6 for January 14 – unchanged
FC: Superman Beyond #2 – moved form January 14 to January 21
Revelation #5 and Legion of three worlds #3 – moved from January 21 to January 28
Final Crisis #7 for January 28 – unchanged

Legion of 3 Worlds #4 will ship in February and issue #5 is in March leading to Adventure Comics #1 in April and will tie into The Blackest Night and Flash: Rebirth. Hence why the major delays on the book.