This is tough because Disney doesn't typically publicize their ride manufacturers. In some cases, they even go to efforts to hide the ride manufacturer. A good example of this is the Maliboomer freefall ride that used to be at DCA. S&S (the obvious manufacturer of the ride) typically has their logo on the ends of the arm rests of each seat. It's this way for every S&S ride I've been on... but Maliboomer? Nope, the logo was missing. Disney has a long history of working with Vekoma, but I don't think this will be a Vekoma. Normally, I wouldn't rely on the computer animated "preview" of a coaster to guess the manufacturer because often, parks will use a commercially available software (like NoLimits) to generate their promotional videos, but the video that was offered by Disney (below) does not appear to be a commercially available software and is much more likely to be software that Disney or the ride manufacturer specifically used. As such, I think you can take more clues from the video itself. The triangular track shown in the video is characteristic of two primary manufacturers: Intamin and Mack. Both manufactures have a history with making launched coasters and Intamin has already worked with Disney in the past (California Screamin at DCA and Indiana Jones at DLP), however, I don't think this is the work of Intamin. My prediction in this case rests solely in the design of the restraints shown and these (coupled with the shape of the track), leads me to believe this will be the work of Mack.