Remember, the Secret of Mana series landed on Switch in Japan in June, albeit in a retro re-release anthology which isn't confirmed for the West. Why Switch isn't included I don't know, especially given the game's Nintendo heritage, but as Xbox One is excluded as well, it could be a Sony exclusivity deal.
ORIGINAL STORY 9.30AM BST: The best game in the world ever, Secret of Mana, is being 3D remastered for PC (Steam), PS4 and Vita, and will be released 15th February 2018. There's no Vita PS Store page yet and the 3D remake of Secret of Mana doesn't appear to support Cross-buy (buy once on PS4 or Vita to own the game on both). Optional in-game purchases are mentioned - but what are they for? If pre-orders get downloadable armour perhaps you can buy it too? UPDATE 11.45AM BST: PlayStation Store pre-orders are now open (thanks, Alcifer) so we know the 3D remake of Secret of Mana will cost £33 on PS4, which isn't cheap.