'Hancock' takes in $6.7 mil in previews

Will Smith pic expands to 3,965 theaters Wednesday

"Hancock" rang up an estimated $6.8 million from 3,680 theaters that scheduled "preview" showtimes of the Will Smith action pic Tuesday night.

Sony expanded the tentpole release to 3,965 locations Wednesday. Although attracting mixed reviews from critics, the pic has been tracking well and is expected to gross more than $100 million through Sunday.

Its Friday-Sunday performance will be measured against those by pics including last year's top grosser over the Independence Day session, "Transformers."

The DreamWorks/Paramount action pic grossed $70.5 million during its first weekend after unspooling with Monday night previews in advance of an official Tuesday bow. (July 4 fell on a Wednesday last year.)

"Transformers" grossed $155.4 million during its first 6 1/2 days. About $8.8 million of that came from its Monday previews.