This 2026 arXiv preprint (not yet peer-reviewed) uses population simulations calibrated to the stochastic gravitational-wave background to forecast when pulsar timing arrays will isolate individual supermassive black hole binaries. The authors inject the loudest source into realistic PTA data sets spanning 0–10 years and run standard detection pipelines, then cross-match resulting localization regions (hundreds of square degrees) against all-sky galaxy catalogs. They explicitly quantify incompleteness, finding ~25,000 missing candidate hosts on average. A ranking scheme based on black-hole mass and redshift posteriors can eliminate roughly half the galaxies when those parameters are available, but performance drops sharply if only apparent magnitudes are used. The study’s methodology—Monte Carlo populations plus one pipeline—highlights a key gap missed by earlier PTA forecasts: even “well-constrained” localizations will still contain tens of thousands of early-type galaxies and active nuclei. Complementary work from the NANOGrav 15-year data set (arXiv:2306.16213) and the EPTA second data release underscores that timing precision improvements alone will not solve host identification without deeper, more uniform spectroscopic surveys. The practical implication is that multi-messenger follow-up strategies must prioritize catalog construction now, before the first individually resolved binaries appear.