In this instance, I don't think the math will be much different in 2021 versus 2020. In both cases, Laurence & Nikolaj will have to be the best team outside the Big 7, and then Piper & Paul will have to be at least fifth. Both of those things are achievable, but require things to go our way. We'll know after Piper & Paul's placement in Montreal whether Lolo & Nik's presence would have mattered.
However, in the event that we are down to two spots in an Olympic year, I'm less certain that it will be Marjorie & Zach on the outside looking in. They've closed the gap with Laurence & Nikolaj quite a bit this season, and essentially being able to rent the #2 position from them for 2020 nationals through 2020 Worlds has definitely helped them there. I expect that Laurence & Nikolaj will return to the #2 spot at the start of next season, but there's still a season and a half to go before the Olympic team assignments, and at L/L's current rate of improvement, I think the space between will continue narrowing.
In other news, Andrew Evans posted another awesome clip of McIntosh & Mimar's triple twist in practice.