The outlook is mighty Grimm for the box office this weekend, with Paramount-MGM's modern retelling of Hansel & Gretel likely to come out on top with only around $15-20 million, according to industry forecasters. Besides Hansel and Gretel: Witch Hunters, two other new films, Relativity Media's Movie 43 and FilmDistrict's Parker are not expected even to cross the $10-million mark. It speaks to the dearth of attractive fare that some industry pundits are predicting that in its eleventh week, Silver Linings Playbook could wind up in second or third place at the box office, although most are betting than the runner-up will be last week's leader, the PG-rate horror flick Mama, starring Jessica Chastain.