Anything!
I'm not picky. Just jealous of all the homebrew arcade ports and indie games the Sega Genesis always gets compared to the Turbo/PCE.
Genesis homebrew currently in the works.
Altered Beast II - Where is Keith Courage II?
Splatterhouse 1 - Where is Splatterhouse 2 on the Turbo?
Rondo of blood - Where is Bloodlines on the Turbo? Or at least an upgraded NES or gameboy castlevania port.
R-Type - Where is R-type 2 or leo for the Turbo?
Final Fight - Where is Final Fight for the Arcade card?
Metal Slug and Wind Jammers - Where is Magician Lord for the Arcade card?
Street Fighter Alpha - Why no hack of the PCE SFII to add the characters from Super SFII on the Turbo?
Batman Returns - Where is a Batman game that isn't an overhead bomberman/cratermaze clone for the Turbo?
There are more fan made Genesis arcade ports but I think you get the point.
I know the Turbo/PCE isn't as powerful as the Genesis. So how about ports of some weeker arcade games? Sinistar, Off Road, Tron, Double Dragon, Black Tiger, Jackal, Badlands, Rampage, Bad Dudes, etc....
Indie games
Why no Xeno Crisis, Life on Mars, Eyra the Crow Maiden, Life on Earth, Demons of Asteborg, The Cursed Knight, Hunter Girls, etc....
I'm not a programmer so I have no idea how much work this stuff takes.
So if it's easier and takes less time, how about just translating some PCE games or just making current games better by changing a few things. Like Golden Axe(character sprites+sound effects), Ninja Gaiden(background scrolling), Shinobi(missing sword attack)Deep Blue(ability to keep power ups or maybe just ad more power up drops)? If there are any CD games anyone can think of that have bad soundtracks and could benefit from a new original hard rock soundtrack, then I'll volunteer to make one.
You hit the nail on the head on several of those games. I'll comment on a few things, but there's at least one project you mentioned, that I'm not allowed to talk directly about yet. But I'll respond with what I know that I am allowed to mention.
Xeno Crisis is a high priority for the PCE. They want to do it on HuCard, instead of CD, so I believe they're waiting for a few developments to be finished. There's a high capacity HuCard in the works that they need. I also get the feeling they're waiting for some more updates on HuCC for them to program the game.
R-type. There is a couple of hacks. One that makes it compatible for the SGX, & another where the original JP versions are put together like the North American version, so that now there's less flicker. Because when the North American version was being worked on, they were forced to make some changes that resulted in flicker.
Splatterhouse 2 & 3. I think those are just a matter of time. Not that I would hold my breath waiting for them, but I think it's more a matter of just waiting for various tools and documentation to help with coding. Would be neat if they were on cd and had cinemas with voice acting. There is the hack of the original Splatterhouse called Splatterhouse Chrome, which is "kind of" a Splatterhouse 1.5.
Black Tiger was being worked on the PCE originally, but was turned into Son Son 2. I do wonder if there's any leftover assets from Black Tiger hidden in Son Son 2's code.
Jackal has a port of the NES version available, but no enhancements.
Golden Axe. A few of us were working on a complete remake of it using the arcade card. I guess I'll say it's currently on hiatus. All the music is ready, most the graphics are ready, there is a working engine for it. My hope is that it'll include enhanced versions of the cinemas from the Telenet version, but I don't recall what the consensus was on that. All the sound effects I think except for one were going to be there. I seem to recall one sampled sound effect that was going to be too long and so we were going to have to adjust it.
Here's some test footage for Golden Axe. The first one uses the arcade soundtrack:
https://youtu.be/JNTbBaIBkyI?si=Afd-E595ELWpnm5fThe 2nd one uses my version where most songs are a combination of the pce version with the Sega classics music. Although there were a few songs I had to redo from scratch:
https://youtu.be/0LK0mJ_Dvi0?si=qJQ1iEtIsstB2d_pHere's the final test footage before it went on hiatus, it uses the arcade soundtrack;
https://youtu.be/7XP53PUagaI?si=vqhGK5O5eQFHP7xtShinobi has a new SuperGrafx version being worked on. Here's the latest footage for that:
https://youtu.be/o5fdQX4xZN8?si=N4I741P7isaOpLCTI have done some soundtracks where I replaced the songs, but the only one I finished was Sylphia. I gave it a prog rock sound, might ultimately call it Sylphia DX. With Turboxray's help, we added an extra song for the final boss of the game. I want to go back and double check the levels and quality, but eventually I'm going to re-release that.