Super Smash Bros. for Wii U screenshot (6/4/14)

Looking at a new item today, Sakurai explains the new Boomerang item as recently seen in Mario Kart 8:

Here’s a new item that we’ve thrown in–the boomerang. As you’d guess, it’ll fly back into your hands after you throw it, and if you keep catching it, its attack power grows with each throw! However, opponents can nab the boomerang out of the air, so it might be an easier item to use in Smash Run.