With the endorsement of the two AK DNC members, we've reached a few notable milestones in the % superdelegates numbers...
If everything goes horribly for Clinton in MI/FL (neither delegation seated), Clinton would need over 90% of remaining superdelegates.
If everything goes as expected for Clinton in MI/FL (Half-Nelson in FL, 10-delegate lead in MI), Clinton would need over 80% of remaining superdelegates.
If everything goes in Clinton's favor in MI/FL (delegation completely restored and At-Large delegation remains Uncommitted), Clinton would need over two-thirds of remaining superdelegates.
Are you counting Michigan's uncommitted delegates as undeclared superdelegates? Many of them have already endorsed and Clinton's own campaign admits that Obama will get at least a huge slice of them.