2022. Hoya has made several changes to their filter ranges that they are called "renewed". The only change is the name, packaging and price. Fusion One Next is the same as Fusion One and Pro1d. The "new" Next line up includes UVs Polarising and Protector filters. The Next range is due to arrive in March 2022.
The new range of Fusion One UV (and Circular Polarisers) is taking over from the famous Hoya Pro1d range. Once the Pro1d's sell out we will be switching over to Fusion One.
After a decade Hoya is rebranding Pro1D filters to “Hoya Fusion One” and dropping the D. Same great filter.
Note please that Fusion One is different to Fusion Antistatic.