That'll work as long as your organizers are willing to push their attendees to use a new thing, but if you want this to truly become a discovery platform and avoid xkcd 927, it would really be ideal to somehow aggregate/scrape public event info from other sources.

Cause yeah, from the consumer side, I'd love to have a single place that could let me search and link me out to events listed on Facebook, Eventbrite, Ticketmaster, Meetup, Fever, etc., and also provide reasonable tools for cutting through what is sure to be a deluge, through some combination of search tools and machine curation/recommendation.