retroactively (adverb)

1. The law was amended retroactively to provide reparations for victims of a past genocide.

2. Fans of the popular anime series were excited to learn that their favorite character would be brought back retroactively in the next season.

3. The studio decided to retroactively change the ending of the cartoon series to please disgruntled fans.

4. The religious leader issued a statement retroactively justifying the controversial decisions made by the church in the past.