Haikyuu!! Season 4 Part 2 release date delayed in 2020 by COVID-19 — To The Top Season 2 set for fall 2020

Haikyuu!! To The Top (Season 4) has been confirmed to be a split-cour anime by animation studio Production I.G. Part 2 will air in the fall of 2020.

Haikyuu!! Season 5 could come with a fresh plot, not connected to Season 4

Anime Postponements Due to COVID-19 Outbreak [Update 2/5]

Haikyuu!! To The Top 2nd Season – 02 - Lost in Anime

Haikyuu!!' Season 4 Part 2 Update: Creator Haruichi Furudate Teases The Return Of The Anime Series

Sword Art Online Progressive: Scherzo of Deep Night' Movie release will be delayed due to COVID-19, future release date unconfirmed : r/anime

When is Haikyuu Season 4 coming out? - Quora

Top 6 Anime Series Delayed Due to COVID-19 - XenoShogun

Haikyu!! - Wikipedia

John's Picks for 2020's Best TV Anime – AnimeNation Anime News Blog