No, you didn't hear wrong, they pretty much said they'd announce something if you took what they said at face value. But I was always skeptical because you can never take what they say at face value. What they said is that they had announcements at AX and Comic Con, what they meant to say was that they'd be at those shows and would also have announcements. They've already made those announcements at AX. They haven't said anything about Otakon yet.
Don't worry, figuring out what JAST's apocalyptically bad PR actually intends to say is an acquired skillset.