Cartoon Network Promo Movie Posters from Cartoon Orbit

That is unfortunate. The site must have recently shut its doors, although Toonarific.com still exists and is (or was, last I checked) maintained by the same owner in Texas. He is the same person who started Retro Reprints and opened CollecToons in 2008. He also told me years ago that Cartoon Network Online deleted all of its Orbit content with the flick of a switch, with no backups in place.

There are plenty of other pages that the Internet Archive has available for MCOAP. Other assets, I would highly assume, are still in possession of the owner. I browsed Archive.org's history of the MCOAP site and found a movie-themed cZone featuring many of the poster cToons I didn't grab a copy of. There still may be more yet....