All games in general? or are these hopeful guesses for E3?
The titles I can think of that are overdue to being announced are Kingdom Hearts 3 (which is already announced), Half Life 3, Metroid Prime 4 (already announced), Mother 3 (localization), a Advanced Wars title, a F-Zero title, and probably a couple more not coming to mind.
I mean some of these games have over a 10 year gap between numbers titles, which are "long awaited" by definition.
Then again, for games already announced, we haven't had updates for games in awhile such as the FF7 Remake, but that's not really "long awaited" in my opinion; it's just a game the fanbase wants.