No, you didn't miss it. There appeared no new declarations thread so far. In the past there even used to be a recruitement thread only a few days after the new FPL game was online, but there isn't one neither this year.
To be honest, atm I have some doubts, if there will be a 5AS competition in the upcoming season, as there were no informations about it so far. The only signs I see are some 5AS teams (mini leagues) which seem to be ready. And my question would be, what we do with them, if there effectively wouldn't be a regular 5AS comp. But maybe I'm just not patient enough.