Algore is history now - no matter what he does. His true believers will always blame him for blowing the election and losing what seemed (to them) certain victory. If he tries to now dispute Dubya's "legitimacy" as president, he will alienate all the Reagan Democrats for 2004. And if he doesn't try to now dispute Dubya's "legitimacy," he'll never get the hard left's support for any 2004 campaign.
That's aside from the hard left now being sure to blame him for betting on the wrong legal strategy!
Algore in his own words, 1992-2000 - including Earth In The Balance