Im convinced, especially with the state of DC these days, Shade will NEVER get collected. I ended up buying Milligan's full run in single issues during a LCS sale recently for this reason.
The only other major delays I can think of for trades similar to Animal Man is over at Marvel. They technically still arent even out yet. Hickman's Fantastic Four Complete Collection Vol 3 has been missing for a year and a half. Vol 2 came out summer 2019. Vol3 is slated for 2021. Same for Man Thing Vol 3 - its been something like 4 years since vol 2 - vol 3 is due in 2021 as well.