This should be in the jobs forum. But, that having been said... If the person with more dollars then sense has been talked into sponsoring 2 hours of animation, then maybe, perchance, the person can be talked into some up-front cash for the work involved as well. If they are sponsoring it, they are sponsoring it. What kind of back-end revenue can there be without some front-end support as well? If they are serious then let's see the contract. Don't ask for my work, for free, and then tell me, "Well... there wasn't all that much resposne, so..." Just my 2 cents worth, but don't rip-off the artist community for your own gain.