Retribution is going to gain quite a few old talents as baseline abilities. You'll always have access to
Estela de cenizas,
Consagración,
Martillo de cólera, and
Palabra de gloria albeit with some changes.
Bendición de sacrificio is a utility ability that we'll once again be able to use to either help save another player during periods of heavy damage or get maximum damage from
Escudo de venganza. Other than that, we're gaining
Escudo del honrado which won't be used very often since it requires a shield equipped to use and many of our other abilities require a two-handed weapon to be cast, and
Ahuyentar el mal which is a single target fear that can be cast on Undead, Aberrations, and Demons.
Auras are also returning to Paladins. These are raid-wide buffs with a restriction that only one can be used at a time per Paladin. Multiple buffs of the same type don't stack. You'll want to make sure there's one Paladin using
Aura de devoción in your group, but if someone else has that buff covered feel free to use one of the other two.
Aura de concentración is also available in Shadowlands but can't be used during pre-patch due to its level requirement.
In place of the now-baseline talents, Retribution will have a lot of new (and some returning) talent options. Azerite Traits
Poder empíreo and
Decreto de la Luz are being added as
Poder empíreo and
Cólera santificada, giving us access to more cleave damage options.
and
Vengador sagrado both allow for more burst oriented builds on a 45 sec and 3-minute cooldown respectively.
Juicio definitivo is a brand new ability that does a large chunk of AoE damage and increases the damage that your other Holy Power spenders do to the targets, and is looking like an extremely potent option as well. On the defensive side of things,
Manos sanadoras increases the healing potential of
Palabra de gloria massively and can be very strong if you don't mind spending some Holy Power on it rather than on your damaging abilities.