Japan's SoftBank Corp.'s talks to acquire Hollywood studio DreamWorks Animation SKG Inc. have cooled, the Wall Street Journal reported, citing people familiar with the matter.

DreamWorks Animation shares sank about 9 percent in extended trading Monday, after surging 26 percent during the regular session to close at $28.18 during market hours on Monday on reports that SoftBank was in talks to acquire the company.

It wasn't immediately clear what had happened between Saturday, when the talks were under way, and Monday, the report said.

However, it was possible that the talks could restart, with the two sides striking a deal other than an outright takeover, that could also be some kind of content partnership, the Journal said.

DreamWorks Animation spokeswoman Allison Rawlings said the company would not comment on market rumors. Softbank could not be reached for comment.