Spectrum_Legacy: Probably will come back eventually as Mikado remix (at least on steam), I bet it will get the same treatment as Raiden 4. No idea why these new versions with remixed ost warrant such dramatic delistings of classics 6 months ahead. Only good thing they could bring is some better scaling or higher resolution support out of the box.
Still, would very much prefer if they fixed what is actually broken... y'know, like Raiden Legacy collection (I know, different dev/pub, but still). Raiden 3 and 4 were both barebone releases, but ran just fine.
This, thankfully I bought this and Raiden 4 already which the latter is already delisted. I predict that Irem will be next as they tend to be jerks and pull earlier than expected. They pulled their games off the Wii U eShop MONTHS ago.