During today’s Nintendo Direct, Satoru Iwata revealed that, per fan requests, Lucas from Mother 3 will be returning to Smash Bros.! Based on the footage shown, he appears to have the same moves as in Brawl, but some of the visual effects have been altered. Some of his alternate costumes are different than in Brawl, but he still has his Claus skin. Lucas is planned to release in June. No price point has been revealed yet.
Source: Nintendo Direct