> I still think it would be the best approach:
> A big endian "ABox" (with 68k Emu and flipped x86 code)
> Native little endian code in some "MBox".
> A bit similar to AmigaOS XL, but instead of QNX [...]

H&P's QNX-based AmigaXL was just UAE running on QNX, i.e. there was full CPU emulation, no native code possible. Running MorphOS in QEMU on Windows/Linux/macOS is identical in concept to AmigaXL and has been possible for years (albeit only unregistered).