I emailed NGDev a few years back to ask them if they had plans to reprint NeoXYX. Timm Helwig wrote me back and said that it would never be reprinted on MVS because of all the flack they got releasing a tate shmup on an arcade platform where all the other games are horizontal display.
What’s the issue with Double Dragon One demo and the Darksoft cart? I’m a beta tester on their firmware and this is the first I’ve heard of any problems. Nothing has been mentioned on the AP forums that I’m finding.
AES was engineered by SNK to convert console gamers to arcade gamers. Lure you in with an AES and next thing you know you're down the CMVS and SuperGun rabbit hole.
I can do that for you if you like. You can either mail me the EPROMs you want flashed if you have some, or you can purchase the EPROMs you need from me at my cost.