They'll also have to announce the games in the first place, but there would be more than that. In any case, there should be more than in the Pokemon Sunday show, but (IMO) what we got from that was a good start.
(And if you didn't see the thing on yahoo or on the Japanese website or... if you didn't go online in general, then unless someone told you about this earlier, Pokemon Sunday would be the first place where you would've heard that these games are coming out. So in my opinion, the fact that they mentioned that these games are coming out is significant, even though we found out about this earlier than expected.)