Though it’s egregiously awful even by the appalling standards of contemporary romantic comedies, Garry Marshall’s all-star “Valentine’s Day” is expected to easily dominate the four-day President’s Day Weekend, with the titular holiday falling on Sunday. Forecasters say that Warner Bros. could rake in as much as $50 million for this New Line-branded atrocity, as poor guys are forced by their dates to sit through a flick that got positive reviews from only 17 percent of the critics at Rotten Tomatoes. I give it zero stars. Second place seems to be a battle between Fox’s “Percy Jackson & The Olympians: The Lightning Thief” (which has nothing to do with those games in Vancouver but is yet another ‘tween franchise on the order of “The Bridge to Teribithia,” those one featuring Greek Gods and their illegitimate offspring) and Universal’s remake “The Wolfman” with Benecio del Toro and Anthony Hopkins, much reworked after missing three prior release dates. Both are drawing forecasts that range from the low ’20s to $30 million. On averge, “Percy Jackson” is the better reviewed, with 54 percent at RT and 2 stars from me. “The Wolfman” get a 2 1/2 star notice from Kyle Smith and is rating a 30 at RT. “Avatar,” which was toppled from the top spot in its eighth weekend by another female-driven flick (“Dear John”)  is expected to finish No. 4 with around $20 million in North America for the four-day weekend.