So where are we at with the options?
I see four ideas:
(likely more or less or something

)
Yellow - with range between? - then Brown (or Orange

)
Pink/tan - with a range between? - then Brown
Yellow and try to forget about Lando and the NBA sets.
Or we could hope they change to some other color. And try to forget about Lando, NBA and all of minifig history. Mahaps like HP troll light blue, or green, or purple, or whatever. A color change to an unhuman color (except, I suppose, a human can freeze blue) would make it obvious that the minifig was ment to be just a representation of all humans. (this idea is an, perhapse undesirable, extension of Legofreak's post about Orange Lando.)
I now see that I had kind of been thinking of this as "white is represented, not black" with Yellow being "white". Perhapse Yellow was ment to be the middle ground; between "white/light" and "black/dark" skin color. In that case you could think that brown (representing dark skin color) was introduced into mainstream system lego before "white" was and those with medium skin color have been the only ones represented all along.
In that case I say keep it yellow man! Middle ground is most unspecific and allows for the best creativity. The middle can be made to appear more one way or more the other way with minor tweaks. I see now, like some of you previous posters were saying, Yellow could be the perfect color to genericly interpret human coloring. I have just now come around to understand that viewpoint.
I can still handle change if TLC goes the other way. It really doesn't upset me all that much.
Like JPinoy said:
If Lego makes a "Real World City" theme, a new Town theme of course, then you could have sets of city-sections and city blocks. Just think of buildings, blocks, and sections of such cities like Paris, Moscow, Kuala Lampur, Delhi, Cairo, Riyadh, Hong Kong, Tokyo, New York, Johannesburg, Rio de Janeiro, and etc. THEN, perhaps I'd be ok with "multi-ethnic" minifigs in regular non-licensed Lego products.
It would be neat if TLC took this direction. Great idea!
Back to the specific question, or close, anyway:
How many skin tones need to be created (with in reason) since TLC has already taken a few steps this way?
My shot in the dark says three(light, medium, dark). But I usualy miss.
Ahh... Mind stretch. What fun!
C
ps: I aggree with you JPinoy. Kids will definetly figure grown up stuff out from exterior sources and shouldn't have to face it when they just want to play.