European retailers have it listed so given that The Lost Sphear is getting a hard copy in 2018 there is a possibility.
As the song says "Don't Stop Believing..."
Also Squenix is self publishing this and more than likely they'll overprint a small amount, but I think it'll be made to order/demand and not overprinted, as has been the case with smaller publishers this generation. (smaller print runs = good profit and no stock to keep in storage)
Unless NOE publishes it for Squenix I still don't see if happening. This isn't the sixth generation of consoles where everything and anything goes was published in Europe.
And honestly, how many EU exclusives have been published in this generation that weren't released worldwide that were JPN exclusive before, there's only been a small handful of Namco-Bandai anime based games (Jojo' Bizarre Adv. & Saint Seiya) that were digital only in the US that got disc copies in the EU.
And like I said, it's readily available at a cheap price to import directly from JPN from Amazon for a good price, why not pick it up other than just being stubborn....that makes no sense.
Not sure about your country, but the yen to USD ratio is very good right now to import directly from JPN at the moment. Your call, but I think it's foolish waiting until it's harder to get and then more expensive.
Edit: I saw your thread with your Gamestop links, however each of those as you say are "placeholders" and have TBC (aka To Be Confirmed) which is not any different than Amazon putting up links for a game then removing them. I wouldn't trust those links, I didn't see any other European retailers (nor the biggie Amazon) give me anything other than digital code options. Even Shovel Knight Treasure Trove is something I'd be hard pressed to see in physical since Yacht Club games basically released Shovel Knight on every platform imaginable.
Also, Nintendo hasn't allowed smaller publishers to do smaller runs of games on Switch yet (Limited Run Games and other smaller pubs have tried to release games, yet have been told not yet by Nintendo) while it's nice having hope for something, it's like me waiting for a US physical copy of Fatal Frame on Wii U, it didn't happen, so I bit the bullet and bought the UK version.