Yeah. If Joshua has some distorted view on what it really means to serve God, then I'll be siding with Daniel.
Well going by Achievements ....
Safety Deposit Box (Trap Father Elijah in the Sierra Madre's Vault) = May my Hand Forget its Skill (Evacuate Zion)
Cash Out ( Confront Father Elijah in the Sierra Madre's Vault) = O Daughter of Babylon (Crush the White Legs) / Restore Our Fortunes (Resupply Daniel and the Sorrows).
I know its not much but it seems its harder to Evacuate Zion that anything else as far achievements go, I am not sure were the White Legs and the Sorrows fit in all this but Joshua is seem in the trailer fighting along with a tribe that does not look to be the White Legs but it does not seem to be the Sorrows either.
I would say Joshua is not in the same role as Father Elijah was, one of the Achievements is also "Scout the Zion Valley for signs of the White Legs" that I suspect the end is you either Evacuate Zion or you destroy the White Legs but even that I am unsure, Zion Valley is right in the Legion side of the Colorado (up north) so why are there at least two tribes in the area? that kinda indicates the Legion have not pushed so far North ... yet and considering the "Evacuate Zion" ...
Also it helps that "If I forget you, O Jerusalem (Zion), let my right hand forget its skill" and "O Daughter of Babylon, doomed to destruction, happy is he who repays you for what you have done to us"" as "Restore our fortunes, LORD, as streams renew the desert" does not seem to fit.