Considering how little we know about the film, I don’t think we can reasonably say that it is an “origin” story.
More importantly, it’s common for a good story to show growth in its main character. If the film were to do that, I guess that would make it an “origin” story, in the sense that by the end he has become more like the Han Solo in the OT just by default, but I’d probably prefer that to a film where he’s just the exact same person as in the original film, especially considering he’s not the exact same person across the trilogy - to that end, is ANH not already a Han Solo origin movie?