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A million years? That very generous (งツ)ว
I believe it's more like a hundred thousand years for humans on earth to go extinct, and another nine hundred thousand to clean the traces.
Whatever comes after us will be a consequence of us. Sort of like how all our modern bird species are echoes of the giant lizards of the crestatous period.
The world will never be "clean" of humanity's traces. No more than it is clean of trilobites that gave us all this limestone or the carboniferous plants that gave us coal and oil.
The future will be whatever species are most fit to live in the world we have created.
Or a hundred (not thousand) to become transhuman and have every short living species forget we existed.
(my regards to SkyNet, StarlinkNet, The Matrix, or whatever)