In some cases your family history research may never be finished. It's a fact of research. The best bet is to write up and organize what you have now, before it is too late.
Even if your research is incomplete, leaving behind a written up adequate citations and a discussion of your research process and your conclusions is better than leaving a pile (or a hard drive) full of unorganized and un-analyzed material. Later researchers can build upon what you have done.
Just start putting things together. Genealogy is the cake batter that's never "quite ready for the oven." Sometimes you just have to bake it.
If you find more information, just add it to the frosting (grin!).