So I feel like my L21 story beats are outlined enough so I've began putting words into my gdoc for L21 - "That Day and Its Aftermaths - and it's already 378 words already.
I think this might be already long chapter since all that I have written right now is merely the herd's reaction and discussion to the plot twist at the end of L20 and we haven't pulled the camera back to the past at all yet...
I am feeling too like L21 might also address, finally, the ending passages of Tiger's Heart wrt Elder Titan to explain how and why that passage at the end between Titan and Ellie DOES "add something" within the contexts of Tiger's Heart and Lacrimosa itself because Manny is addressing cross-species' suspicions/hostilities looming in the CI present right now (for one, Axel - and Diego - are technically NOT WELCOME in the Bredelands because of Titan's new rules) and how he means to fix it by becoming Regent Elder.
However, anyone who has read Tiger's Heart will be aware that a hard road awaits him and Diego if he should do so...