It doesn't matter how hard companies try to hide their next moves, eagle-eyed observers will always find ways to sniff out all the hidden details.
For example, internet sleuths just found out that the first two Syphon Filter games, as well as Dark Mirror and Logan's Shadow, have all been re-rated in Korea for the PlayStation 4 and the PlayStation 5. The timing of the new listings all but confirms that Sony is adding the aforementioned titles to the Premium tier of the revamped PlayStation Plus as part of the "beloved classic games" catalog of the three-tiered subscription service.
Weirdly enough, 2001's Syphon Filter 3 for the original PlayStation and 2004's Syphon Filter: The Omega Strain for the PS2 was not rated.
Sony made the new look PlayStation Plus official in March, but fans aren't exactly happy. In particular, many have expressed their disappointment that Sony is still not adding new titles to the PS Plus library on day one. To make matters worse, day one launches isn't something that the console manufacturer expects to do anytime soon for the PS Plus.