It is not too late to submit events, but sooner is definitely better than later.
Event registration is open for VIGs. Event registration for Regular Badges opens up September 1st. So submitting your events in the next week or so, in time for open registration, will be a very good thing for your game. It takes us a few days to review and approve the submissions. Occasionally there is a little back and forth if we have questions on the submissions. So get those submissions in as soon as you can.
And finally, thanks for submitting events. GameHole Con is about Gaming. We need quality GMs to run awesome Games to make our Con a success.