Depending on the artwork it would be worth looking at newer collections - if they were assembled digitally there may be instances where portions of the panels are separate which obviously makes it a lot easier.
In the case of older artwork you've got the extra work of filling in the gaps if you lift characters from the background.
Rebellion also the best copies of the art, outside of those people who own the original art.
Why not run a compo to do a trailer for a trade? Even possibly approach some of the After Effects tutorials sites like Videocopilot, supply decent res elements and see if anyone fancies a go?
You'd need to offer a decent prize - maybe some original art, but I'd say it's worth a try to see if there's any interest...