Warner Bros., which was the first to impose a 28-day embargo on the release of DVDs to Netflix, RedBox, and other cheap rental companies, is likely to double that delay this year, according to published reports on Thursday. The studio, which is believed to have taken a big hit on DVD sales in the third quarter, is expected to announce the new delay at the Consumer Electronics Show in Las Vegas next week. Universal and 20th Century Fox, which also impose 28-day embargoes on Netflix and Redbox, are also expected to double that time period.