Any chance we'll ever get Raiden II (not Raiden Fighter II, just Raiden II) on here ever? I used to have it on CD but it broke. :(

I highly doubt Raiden Legacy will get an update with the game, or that we'll get a new legacy version with it and DX.

That said, you can play the arcade original on MAME, just search around a bit on the internet and you should find it.

I'd start looking for it over archive dot org, as I've found a lot of old ROMs over there in the past.