If you google Valiant Comics on Amazon and organize it by New Arrivals then it'll tell you. Here's the list from what I've gathered as every Oversized book they've released since the publisher re-opened.
X-O Manowar Vol. 1
Harbinger Vol. 1
Bloodshot Vol. 1
Archer & Armstrong Vol. 1
Harbinger Wars
[Complete Classic Quantum & Woody Omnibus]
Shadowman Vol. 1
[X-O Manowar Classic Omnibus Vol. 1] (book is oversized, art isn't)
Quantum & Woody Vol. 1
X-O Manowar Vol. 2
Q2: The Return of Quantum & Woody
Harbinger Vol. 2
Bloodshot Vol. 2
Unity Vol. 1
Divinity
The Valiant
[Archer & Armstrong The Complete Classic Omnibus]
Archer & Armstrong Vol. 2
- There was supposed to be a Bloodshot Classic Omnibus Vol. 1, but it hasn't been released
Book of Death
UPCOMING RELEASES
Rai Vol. 1
Ivar, Timewalker Vol. 1
Shadowman Vol. 2
X-O Manowar Vol. 3
The only "event", if you can call it that, they haven't released in a Deluxe is Dead Drop because it was apparently not received very well.
And if you want to go on the Valiant board for more detailed information into stories and certain titles and stuff here is the link:
http://community.comicbookresources....spects/page247