I really like Jabba the Hutt and his species, but I don't think they're capable of carrying a two-hour big-budget movie all by themselves. Jabba and his fellow slugs are much more enjoyable in limited doses....if they were on the screen every few minutes or so it'd get tiresome fast.
Unless it's this guy:
Ziro's like a mix of Sydney Greenstreet, the sheriff from Cool Hand Luke
and Truman Capote.