Certainly not impossible, far from it
I think two things become certain, GA & ND are in. Everything else becomes a crapshoot
Maybe Iowa leapfrogs into the mix as a two loss Big ten champ
Maybe Oregon comes back into the picture if they avenge their Utah loss
Maybe Baylor draws some consideration as the Big 12 champ despite two losses.
You’ll have a bunch of two loss Big Ten teams aside from Iowa to consider as well (the Michigan’s and Ohio State). There’s a big round robin there of “they beat them” . Iowa would in theory have the edge over all of them because of the conference crown I guess, but they were all the way down at 16 entering this weekend
Two loss bama is probably still in the mix too