Sony’s Karate Kid: Legends could be in for the fight of its life at the box office this weekend as Disney’s Lilo & Stitch threatens to steal its thunder. The latest chapter of the Karate Kid saga, Karate Kid: Legends, grossed $2.5M from Thursday previews from shows beginning at 2 p.m. Analysts expect Legends to kick its way to $25M-$30M against the continued success of Disney’s Lilo & Stitch. Disney’s live-action animated hybrid could scrabble to an additional $60M this weekend if the mouse-eared studio’s chaotic blue alien remains strong. Meanwhile, Tom Cruise’s Mission: Impossible – The Final Reckoning could run out the clock with $32M (or less)…