I'm interested...but only after we find out that the game is any good. And that it will be released on PC. I sort of doubt that 5pb would even want to work with JAST though. JAST likely only got their foot in the door with Steins;Gate because they had a working relationship with Nitro+. 5pb appears to be developing Steins;Gate 0 independently.
Yeah I was wondering whether Nitro+ is involved with this sequel. Based on the video it just looks like 5pb is working on it, and if Nitro+ isn't involved it's very unlikely it will be localized by JAST. The game could be very different to the original Steins;Gate without Nitro+ anyway.
I know that 5pb "took over" everything to make Robotics;Notes, excluding Nitroplus entirely. Personally I'm a lifelong fan of the "edge" that Nitroplus always brings to their works (game/anime/whatever), and if enough fans feel the way I do, it might be an indication why the series didn't get support by fans.