Apparently, the focus of the event will be on updates that Google is bringing to Google+. If you're a member of the social networking site, click on the sourcelink so you can RSVP to watch the festivities live.
We don't expect to see any news related to the two launches that everyone is waiting for, that of the Google Nexus 5 and Android 4.4. The most reliable tip to date, from @evleaks, is that both will launch on November 1st.
Google's press conference on Tuesday will reveal updates to Google+
source: Google+ via AndroidGuys