I never saw Dragon Knight, unfortunately, although I heard good things about it.
In general, though, I think it'd be a shame if nobody at least attempts to bring Kamen Rider over to a mainstream American and European (and Antipodean, one supposes) audience again. The market likes superheroes, that much is undeniable, and Kamen Rider offers a lot of interesting storylines that can be adapted in interesting way.
So, I don't know how likely it is - or how likely it is that Adness will be given another shot at it - nor do I know how good such an adaptation would be (it depends a lot on who's doing the adapting), but I would hope someone gives it another go.
...
Heh.
Just imagined a BBC Kamen Rider.
You can't tell me that wouldn't be amazing.