Early estimates have “Avatar” winning the Friday box office with $9.1 million (over “Legion”'s $6.7 million), which means several things:

1. It now has $526 million domestic. So it should pass “The Dark Knight”'s box-office total of $533 million today and thus become the second-highest-grossing domestic film (unadjusted) of all time.
2. When that happens, it'll become the highest-grossing film of the decade. Which means James Cameron has had the highest-grossing film of the decade two decades in a row. Not even Lucas (1970s) or Spielberg (1980s) can say the same.
3. On a lesser scale, and assuming no surge from “Legion,” it will be no. 1 for six weekends in a row. No other film of the 2000s had better than four weekends in a row. It's the longest reign atop the weekend box office since, of course, “Titanic,” in 1997.

Build it well and they will come.

“I want you to open at $75 million and then drop only one or two percent the following weekend, and never drop more than 30 percent any weekend. This is going to be a movie with legs, OK?” “OK, Skip.”