Prediction, Walt, Todd, Nazis, Lydia all die. I also wouldnt be surprised if Marie killed herself but I feel like that would be too much death for one episode. I'd be surprised if Jesse isn't the one who kills Walt..Imagine the series ending with Jesse finding his heisenberg hat and throwing it into hydrofluoric acid.
Theres also the issue with the money. Either Walt loses it all or he manages to give some to Holly at a future date. I think it'd be cool if at the end of the ep an older Holly finds the tape walt recorded for her saying how it's all for her and he loves her.
Gretchen and Elliot aren't going to be in the finale as stated or at least implied in the podcast. So the ricin isnt for them. The obvious thing would be that Walt would poison Todd/Lydias tea with it as they have been pushing lydia and todd drinking tea for awhile.
Only thing I know for sure is that all of my predictions are wrong and something completely opposite and unexpected will happen. haha