I just hope it will have a compelling story and will look like a modern game and not like an HD-version of a game from the late 90'/early 00'.
Why is nobody talking about Kensuke Tanabe. I think he is much more to worry about than Retro Studios. He's the producer of Metroid Prime: Federation Force!
Why would it look like an HD version of a game from the late 90's/early 00's, it's a new game, that makes no sense. If you mean in terms of gameplay and features and not just graphically, yeah, that's a potential concern, but we can have no way to know what the game will actually be like. The thing is, having lengthy and well-worked cutscenes isn't a requirement for a game to look modern at all.
Nobody's talking about Kensuke Tanabe because he's no reason to worry. Yeah he was the producer of Federation Force, that's pretty lame, but he was also the producer of the Metroid Prime trilogy. He's been with this series from the very beginning and it only makes sense he gets to continue doing it. Maybe he's had one misstep with Federation Force, but to ignore the rest of his work because of it is quite ridiculous, especially given that it's only a spin-off game that didn't really mean much in the grand scheme of things. See, the reason everyone hates Federation Force so much was because of what it meant to us at the time, with the Metroid franchise having been in the dark for several years after an embarassing game in Other M - but the timing of the release aside, it wasn't that bad a game to begin with, and you have to consider that from Tanabe's point of view, well, he probably already had plans for Prime 4 and knew it was gonna happen. He's absolutely no reason to worry.