I'm working on a project right now that lacks well-specified requirements, yet we're barreling ahead with the implantation. I'm not exactly sure what's going to

I'm working on a project right now that lacks well-specified requirements, yet we're barreling ahead with the implantation. I'm not exactly sure what's going to happen. My guess is that we'll end up with an MVP that meets the known requirements, but then we'll have to rewrite some part of it to meet the as-yet-unspecified requirements.