I'd be up for a Saturn rerelease. With the Japanese games that never made it over to North America or the games with limited release.
Shining Force, Saturn Bomberman, Dragon Force (sp?).
It really wouldn't be economically feasible to re-release Saturn hardware, or a hardware emulator like the recent consoles (NES/SNESmini, etc.) because the hardware is literally too complex.
The complexity of the Saturn hardware rivals a fully tricked out Genesis setup. It has three main CPUs (two SH2s and one 68EC000 for sound), two VDPs of varying capability and the optical drive has its own dedicated CPU and operating system for copy protection. The optical drive took decades to crack because it was basically a walled fortress, nobody could figure out how it worked from the limited Sega documentation.
No emulator to date can emulate a Saturn 100% accurately because the timing between all of the CPUs and video processors is too strict. The hardware is basically the perfect Dependency hell, each component depends on being fed data just as the previous bit is done processing it, there is no leeway for error. Saturn emulators work by time sharing, they'll emulate a set number of instructions from one part, then the next and so on. But even so, it still requires a pretty beefy CPU to emulate it fast enough to make the game playable, think quad cores with lots of memory.