If there's even the slightest chance that one day, you might go ahead and buy Samurai Shodown, then we'd definitely recommend heading over to the PlayStation Store and claiming the game's season pass for free. Contrary to previous reporting, you don't actually have to buy the game to get the season pass. Simply find it on the store and grab it.
The season pass will give you access to four additional characters, the first of which is out in August. It includes returning warriors Rikimururu, Basara, Kazuki Kazama, and Wan-Fu.
And yes, this is your last chance to snag it without paying a penny. The offer will no longer be available starting tomorrow, the 2nd July 2019.