Seems that the China Confucius Foundation, whoever they are, has decided to create the definitive portrait of Confucius: 

The research and assessment work for the official portrait of
Confucius, sponsored by the China Confucius Foundation, has been under
full swing in Ji’nan, capital of Shandong province recently.

The Foundation launched the initiative because there are
different portraits of Confucius available in China’s society for the
moment, and even there are deification and ugly portraits of Confucius
in the country. This has serious impact on the fine image and
personality captivation of Confucius in public mind.

The authentic and brilliant Confucius image in line with
historical reality will be shown at the Shandong International Cultural
Industry Expo in June 2006. The foundation is now collecting the
"designed plan for the standards of Confucius portrait".

    We really would not want anything short of the "authentic and brilliant" image "in line with historical reality."  But do we really know what that "historic reality" was?  Look at what they are relying on:

The collected portraits should be in accordance with the specimen image
made by Wu Daozi in Tang Dynasty (AD 618-907) and in reference to
related historical records. The portraits should be made with unmatched
skills, featuring demeanor and temperament of the great thinker and
educator in ancient times. In addition, the images should be made in
accordance with the teaching drawings in dress, personal adornment and
gesture. The age should be between 60 and 70. The facial appearance
should be gentle with severity, mighty with softness, and reverent and
calm.

    So, the "specimen image," which I take to mean the picture deemed the most "authentic," is one made over 1,000 after Confucius’s death.  That’s sure to be "authentic," unsullied by historical accretions or the interpretive frame of the painter, right?   Could we ever know if he had been physically ugly?  Probably not.  We can’t really know what he looked like.

    Why not, then, do a picture of him smiling?  It’s true that chapter 10 of the Analects depicts Confucius as solemn and reverent.  But how about this passage:

The Master went to Wu-ch’eng, and there heard the music of voices and strings.  Well-pleased, the Master smiled and said: "What good is a big ox-cleaver when killing chickens?"  (17.4)   

   Music could make him smile.  Why not make that his "authentic" portrait?