Don't hold your breath waiting for it. Even if this is correct, you can't expect it within the current millenium.
Personally I *do* favor the "Nemesis hypothesis", but there isn't any good evidence. And there isn't any contrary evidence. If it's in the southern hemisphere then the Rubin sky survey should record it, but actually finding it in that mass of data would be quite difficult, and it might be in the northern hemisphere. And we'd be looking for either a quite black hole, a neutron star, or possibly a brown dwarf...and depending on which it was they'd have different orbits. (The idea is that they disrupt the Oort cloud via gravitational interactions, and those three are very different in gravitational strength.) The black hole would probably be hardest to see, since it wouldn't be expected to have an accretion disk. (If it did, we'd probably have seen it already.)