Disney has announced the next flat ride coming to Pixar Pier in 2019, which I believe will take up the site of the former Maliboomer towers. Themed to Pixar's Inside Out will be the "Inside Out Emotional Whirlwind"... which may look a bit familiar, as it appears as if this may be a rethemed version of the Flik's Flyer ride from A Bug's Land, which is expected to close at the end of this summer.
Also set to open in 2019 will be Jessie's Critter Carousel, the former King Triton's Carousel after getting thumped with the Pixar wand of rethemeing.