This is another hypothesis of mine, I'm 13, aspiring quantum physicist, and don't have the recourses to test any of my theories and hypothesise. This may also already be a theory/hypothesis, but nevertheless, here go's:
What if black holes are just gravity wells, or massive vortexes of entropy? Ok, so, what if as a star shrinks and dies it's gravitational field enlarges, which pulls in every quark in an immediate vicinity, which then collide with the photons, etc. explaining the theorised warp appearing around theorised black holes. Which would mean that black holes don't "go" anywhere, it's just everything that enters it's area gets... I don't really no the correct term, so I'm just going to say destroyed or disintegrated.
Again, I can't test this. It's just an idea I came up with.