The preview currently lists just over one hundred items, with other items being hidden in the publisher listings for one reason or another. You'll note that many of the game listings are for prototypes that will be crowdfunded at some point, and that's not surprising given that Origins is far cheaper than Gen Con for the aspiring publisher-to-be, so if you want to put something new in front of gamers, you're risking less by showing up in Columbus, Ohio ahead of the rush of gamers to Gen Con in Indy.
If you plan to attend the convention to sell or demonstrate a new game that's not listed in this preview, please contact me via email through the address in the BGG News header. I'll be at the show for a couple of days to take pics, check out new and upcoming games, record a video or two, and otherwise make a nuisance of myself.