In a new Twitter post made earlier today, Nihon Falcom asked its 167,000+ followers an important question about Trails of Cold Steel 1 and 2 getting a remaster for PlayStation 4:
If you don't speak Japanese, this is what the tweet says:
"We already really want to release those! Are we able to anticipate how much demand there will be though? (This is a personal tweet though lol)"
This is in response to a message asking for PS4 remasters of both games.
While it's certainly not a confirmation of it happening (they clearly say as much), considering how the rest of the series has been successful on other platforms, especially with Trails of Cold Steel 3 or Sen no Kiseki III) will be PlayStation 4-exclusive, it almost seems inevitable.
It's also worth pointing out the Nihon Falcom account has in the past shared articles from western journalists about its games or announcements made from XSEED, Aksys, and NIS America regarding their catalog. So even if you don't speak the language, you should definitely show them your interest!