It's really hard to suggest any title, because IMO the title should kind of reflect the content of the album (usually lyrical, sometimes musical as well) or the feelings/situation of the album's creators during its production; so without knowing the lyrics or even song titles we can't really think of anything suitable, I'm afraid. Besides, the TestA-guys would usually come up with some nice names, so I have faith in them
However, giving some suggestions just for fun is actually...funny, so what the hell.
Some references to the past titles, Thrash Metal (although I think using words like Thrash or Metal in titles is rather infantile... we do it just for fun, though... aren't we?) and TESTAMENT's RETURN:
The Heritage/The Thrash Inheritance
The New Disorder/The Order of (in?) Chaos
Thrash The Wall/ObeyThe Wall/ or just simply- The Wall
The Hunting
The Eerie Inhabitants Strike Back/Trail By Thrash/Rain Of Terror
Into the Deep/Into the Greed
Disciples of the Apocalypse
The Creeeeature/The Pitcher/The Feature
Nobody's Cold.. in Hell
A Day Of Reckoning/Musical Death
BLESSED IN RETURN
The Pink Mouse Effect
Sins Of Comission/SINS OF DELAY
The Bar Lad
TESTAMENT (COMING BACK TO YOU)
THE END OF THE BEGINNING/The Beginning Of Waiting/The New Beginning/Waiting To(For?) The End
Face In Disguise
SOULS ARE BACK
Absence of Night/Hate To Love/Madpractice/All Men's Fate
High/Blades Of Gore/C.D./Dog(God) Faced Dogs/Dog Eat Dog/All I Could Drink/The Lost Call
LEGIONS (OUT OF HIDING)
The Money Refusal/The Turning Times/Together As Testament/10000 Phones/Doe John(Dow Jones)
6 YEARS IN DARKNESS/3 Days In Aspen
CAREFUL WHAT YOU WAIT FOR
RESTITUTION/RESURRECTION/BACK FROM THE DEAD/BACK (OUT) FROM THE PIT
Some reference to the other greats of Thrash:
God Loves Us All/We Hate (Love?) You All
Re-Gathered/Gathered Again
St.Hangar/St.Hunger/St.Hanger
The Art Of Living/Thrashing/Frying
and for those of you wanting a Kreator reference- here's one: RECONQUERING THE THRONE
Seriously, I wouldn't mind if they entitled it simply: The New One, The New Album or TTYHPWFFSLATNFKYA (the album that you have patiently waited for for so long and that now finally kicks your ass)