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 discussion of your research process (with citations–even if not perfect–the world will not end) 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.
This metaphor may be half-baked, but hopefully readers get the point.
If you find more information, just add it to the frosting (grin!).