The impression I get from this topic is that everyone wants every game remade... which is both implausible and pointless.
Sonic CD started off its life on a reasonably obscure and expensive system, was ported to the PCs of fifteen years ago and showed up in a messy form as part of Sonic Gems Collection. It's the only Sonic game I can think of that genuinely needed a bit of cleaning up and re-releasing to the masses - Sonics 1, 2 3 and Knuckles have been ported dozens of times (including to XBLA) - nobody in the right mind at Sega would remake them in the near future. For Mega Drive games it's cheaper to just emulate - I think that was the original plan for CD too until Taxman came along.
Knuckles' Chaotix is about the only game they could get away with without having to resort to spending weeks and months on asset creation. But I'm not sure if there's a huge demand for that game - reviews have always been a bit mixed and we get into that "who owns Mighty" territory again.
I imagine the pros of the Retro Engine simply include the ability to build versions for a variety of different platforms very easily. You could probably make all sorts with it, and developers would weigh up the pros and cons of using Taxman's work over other peoples'. I'd imagine the Retro Engine is very good at running "classic" games (hence its name) and doesn't have all the uneeded overheads something like, say, the Unreal Engine would have. But likewise even though it can probably be pushed to make great 3D games, it's probably not going to out-class the works of others. Because the Unreal Engine for example has had at least ten years worth of work done to it.
Sonic CD started off its life on a reasonably obscure and expensive system, was ported to the PCs of fifteen years ago and showed up in a messy form as part of Sonic Gems Collection. It's the only Sonic game I can think of that genuinely needed a bit of cleaning up and re-releasing to the masses - Sonics 1, 2 3 and Knuckles have been ported dozens of times (including to XBLA) - nobody in the right mind at Sega would remake them in the near future. For Mega Drive games it's cheaper to just emulate - I think that was the original plan for CD too until Taxman came along.
Knuckles' Chaotix is about the only game they could get away with without having to resort to spending weeks and months on asset creation. But I'm not sure if there's a huge demand for that game - reviews have always been a bit mixed and we get into that "who owns Mighty" territory again.
I imagine the pros of the Retro Engine simply include the ability to build versions for a variety of different platforms very easily. You could probably make all sorts with it, and developers would weigh up the pros and cons of using Taxman's work over other peoples'. I'd imagine the Retro Engine is very good at running "classic" games (hence its name) and doesn't have all the uneeded overheads something like, say, the Unreal Engine would have. But likewise even though it can probably be pushed to make great 3D games, it's probably not going to out-class the works of others. Because the Unreal Engine for example has had at least ten years worth of work done to it.

