No way- he needs to be brought back slowly, and that doesn't mean making him play a back to back straight away. We need to see how he responds to a single game first, and take it from there.
If he plays the Celtics game, that means he can't play the Nets game. The Nets game is more winnable (though they are extra motivated against us so even then it's not going to be easy- still can't believe D Williams last game against us), and their defense isn't as good- he has a better chance of making an impact in that game.
What's the point in rushing him back to play against a tough, physical, defensive team, and then have to play again the next night?