Retribution is going to gain quite a few old talents as baseline abilities. You'll always have access to
Aschewelle,
Weihe,
Hammer des Zorns, and
Wort der Herrlichkeit albeit with some changes.
Segen der Aufopferung 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
Schild der Vergeltung. Other than that, we're gaining
Schild der Rechtschaffenen 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
Böses vertreiben 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 der Hingabe in your group, but if someone else has that buff covered feel free to use one of the other two.
Aura der Konzentration 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
Himmlische Macht and
Erlass des Lichts are being added as
Himmlische Macht and
Geweihter Zorn, giving us access to more cleave damage options.
and
Heiliger Rächer both allow for more burst oriented builds on a 45 sec and 3-minute cooldown respectively.
Letzte Abrechnung 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,
Heilende Hände increases the healing potential of
Wort der Herrlichkeit massively and can be very strong if you don't mind spending some Holy Power on it rather than on your damaging abilities.