Call me crazy, but I think a deal with CAR still makes sense. They have some space (~4M), they can move Gardiner (1yr left @ 4.1M), and a big hole at 2C right now (Necas/Kotkaniemi/Staal, none of which fit well).
They are probably looking at Kadri, since he won't cost assets, but assuming he goes elsewhere, VAN should allow CAR to talk extension with Miller, and if they can get him to agree to one, CAR can send Necas (who is RFA), Morrow (future RHD) and a lotto-protected 2023 1st.
CAR can afford the Miller extension for several years at least before running into any problems because of their excellent cap management on Aho, Teravainen, Pesce and Slavin's contracts, all of which have 2-3 more years on them. Pacioretty and Staal's deals are up after this year, while Miller's is cheap, so they have that space to work with right away.
Makes sense for both teams, no?