According to a press release dated 5 July 2018, the National Bank of Poland plans to introduce a revised 50-złoty note on 16 July 2018. This is merely a signature and date variety of B861, not a new type. Courtesy of Jan Boguś.
To commemorate the 300th anniversary of the “Coronation of the Icon of Our Lady of Częstochowa” (The Blessed Virgin Mary), the National Bank of Poland plans to issue up to 55,000 new 20-złoty banknotes for 60 złotych each beginning on 21 August 2017. The note was designed by Justyna Kopecka.
According to a press release, on 10 February 2017 the Narodowy Bank Polski introduced a new 500-zloty note to “ensure the uninterrupted circulation of cash and a reduction in the cost of issuing currency, and will also satisfy the growing demand for high denomination banknotes.” B864 (P190): 500 złotych (US$125)
According to ordinance 30/2016 of 1 December 2016, the National Bank of Poland intends to introduce the following new notes: The 120 x 60 mm dark brown 10-złoty note will feature Prince Mieszko I on the front, dinar coins on the back, and is dated 15 WRZEŚNIA (September) 2016. 1