Hmm I'm going to humbly disagree there on one system Bill, the Sega. Your company in the past has off and on again re-offered up on the market a handheld SMS/GG emulator device that unlike until the HD box, accurately portrayed the audio, visuals, and play mechanics of the SMS+Game Gear. Given it had a notable size of the market against the Game Boy for a time and with the various portable direct ports or other offerings from main franchises there's a lot of excellent stuff there of name to exploit.
I still have that awesome handheld and it's worth it completely: https://segaretro.or..._Gamer_Portable
I do agree that the Neo Geo would be huge given the overall total success of the ACA Hamster releases, and all the idiots thinking the hotmess of sorts Neo Geo X paying $500 for those packages now on the after market, the money and interest is there. I can't speak to Apple ][e but I'd wonder if that would be a bit more challenging. TG16 though, I can't see that doing well as the under 100 hucard releases in the US many of them blew, fewer people would remember them, and those of note some of them would have to get license approval adding more layers of bs. Yet, if it would include PC Engine stuff, then you'd have something, but then you're into the language and unknown value barriers making it a clear loser for the flashback offerings.
Edited by Tanooki, Wed Apr 18, 2018 2:40 PM.