According to the Dish Dish Podcast, a Wreck it Ralph themed attraction will replace Stitch's Great Escape in Tomorrowland at the Magic Kingdom. If true, the new attraction would be themed around Sugar Rush in the film, and would be a VR simulator driving ride. Wreck it Ralph was popular when released, with a sequel being released in 2018.
This new attraction would be part of a complete overhaul of the Tomorrowland area expected to be completed by WDW's 50th anniversary in 2021. Work is already underway to spruce up the area with a new paint job on Carousel of Progress, and repainting of the rockwork currently underway.
Disney has not officially announced anything, so as with all rumors, we should take this with a grain of salt.
