Would be cool
Hi Larry
Another star-system on our cosmic door-step would be incredible - though of course it'd need to be a lower mass brown-dwarf or a black-hole to remain invisible at the distance Cruttenden proposes. If it's a black-hole then the death of its progenitor would be the source of all the supernova traces in meteorites and explain the wealth of Al-26 the asteroids and moons started off with.
I don't think Cruttenden has demonstrated his proposal yet, and his efforts verge into pseudoscience in some respects, but it's a hypothesis worth investigating.
Adam