^As far as I remember, in the original series the most that we ever got to see of Claw was his arm and in one episode his silhouette.
There was the Claw action figure where you got to see his entire body (including his face), plus you get to see him in the old SNES game. Both (I believe) were released a great while after the series original run though.
Because of this, and because his appearance didn't seem to match the cartoon character's voice at all (atleast not in my opinion), in my book neither have anything to do with the original series.
And I agree with you on the Disney remark. They didn't even aim it at the correct age group (the correct adult age group anyway…obviously the movie would also be aimed at kids).
EDIT - AND SPOILER ALERT (I guess)
Here is what the action figure looked like complete with face…
http://www.midnightsociety.com/web/Finds/Shopping/Drclaw/drclaw.htmland here he is in the SNES game…
http://inspector-gadget.net/clawf.jpg