I'm fine with another Nier Collab. The main thing that made the last one a problem was more so the integration with the dwarves felt off. If they ever did another crossover with major content, it would be better if we accidently got pulled in via space time travel. I still remember a game I had played a long time ago where the entire game was a bunch of different worlds all smashed together for a time. Think it was either Game Cube or Dreamcast.

But the thing is, when a collab gets done, there are two sides of the coin: Fan Service and actual progression or expansion of the creative work. The Neir collab that happened earlier was more fan service and the actual progression or expansion of creative work came on the FFXIV end. A true collab doesn't just expand on one side, but considers how both ends would impact one another in a realistic sense. Super technology is nothing new to FFXIV, but the worlds of FFXIV have forever had magic in balance with technology. Humanity of the Nierverse didn't have magic until much later, and progression of technology had moved forward to the point of rivaling magic. So when magic did become a force, they treated it far differently and with a scientific process. That kind of mindset would cause a completely different evolution in terms of spells and power (which to be fair, was seen in the raids).

Once someone sees or even glimpses that kind of unique take on magic, why would they not further explore that strange land? We saw a bit of that with the dwarf but it was all personal. I think Eulmore would take great interest in those mecha and other types of technological wonders. That and the warrior of light could easily bring parts back to Cid and the source, which could lead to the development of new magitech even more advanced than the current levels.