Future Japanese battleships turn Tsushima into annihilation

How would the Russians react if later Japanese battleships appeared at Tsushima?

They would be annihilated, because even one of the later ships would overmatch the Russian fleet by an extraordinary margin.

Fusō, Nagato, and the other later Japanese battleships in this hypothetical would overwhelmingly outmatch the Russian fleet at Tsushima. Even a single one is judged capable of destroying the opposing fleet. Bringing several therefore produces an even more one-sided outcome. Their pre-dreadnought appearance would conceal a much greater difference in their actual equipment and capabilities.