Healthcare packages are likely to be revised and profit-sharing agreements could be altered in talks for new contracts scheduled to begin on Monday between the United Auto Workers and The Big Three U.S. automakers, the Wall Street Journal reported citing people familiar with the negotiations. Health care costs will be a central issue in the talks, as the automakers face paying a so-called "Cadillac tax" of 40 percent on rich UAW medical plans starting in 2018.