Retribution is going to gain quite a few old talents as baseline abilities. You'll always have access to
Traînée de cendres,
Consécration,
Marteau de courroux, and
Mot de gloire albeit with some changes.
Bénédiction de sacrifice 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
Bouclier du vengeur. Other than that, we're gaining
Bouclier du vertueux 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
Renvoi du 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 dévotion in your group, but if someone else has that buff covered feel free to use one of the other two.
Aura de concentration 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
Puissance empyréenne and
Décret de la Lumière are being added as
Puissance empyréenne and
Courroux sanctifié, giving us access to more cleave damage options.
and
Vengeur sacré both allow for more burst oriented builds on a 45 sec and 3-minute cooldown respectively.
Rétorsion finale 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,
Mains de médication increases the healing potential of
Mot de gloire massively and can be very strong if you don't mind spending some Holy Power on it rather than on your damaging abilities.