There are other Chrono Trigger hacks still out there. One that adds a Coliseum to Chrono Trigger itself. Another that starts after the battle with Magus showing what happens to Magus after that point. Crimson Echoes is made by the one who made the Magus one.
How many Final Fantasy hacks are there?
It's not really that they even bother with most hacks. It's the ones that cover everything they're doing Square ends up sending the cease and desist letters to.
Chrono Trigger Resurrection made CT look anything but bad with how much effort they were regularly putting into the remake. Now, yes it wasn't a full remake, but it was specific parts in the game that you could go through and view those parts in 3d. The game was almost completed when Square sent the cease and desist letter. I personally think Square thinking this project would make the company look like some sortof joke, what with these people doing this for free and Square doing nothing for the series. Same thing with the most recent CT fan game, where as Square rereleases CT with hardly anything added to it, and fans getting no pay whatsoever putting alot of effort into developing a fan made game. How bad would that make Square look?
It's really a lose lose situation for Square with the cease and desist letter as their only option, but if these people wanted to get away with it, they wouldn't have sent Square a personal invitation of introduction showing every detail of the game. If they waited until the release, then what would Square really have been able to do?
*edit*
I think the creator should just comply with "fuck you Square" and take the 150,000 fine. If every Chrono Trigger fan paid a dollar towards that fine, then well over 150,000 could be paid. Fans wouldn't be paying for the game, they'd be paying the fine.