I don't think the Lakers will break up their nucleus. Not when they are the defending Champ.
I do expect them to consider changes in the summer though. If they fail to get to the Finals or fail to put on a strong showing once there (lose in a short series).
Interesting what would you expect them to do?
I think Bynum will be the guy they make available.
I think they'll look to leverage him into a star talent ... probably a perimeter player.
They have been very reluctant to do so to date because they believed his size, interior defense and rebounding was the difference between losing the Finals to the Celtics in 2008 and winning the Championship in 2009 and 2010.
I think that reluctance to deal Bynum will disappear if they fail to win a title + if they continue to look a step below the rest of the elite teams in the NBA (Miami, Boston, perhaps San Antonio).