Vad hände med Saruman efter att han var knivad av Grima?

To the dismay of those that stood by, about the body of Saruman a grey mist gathered, and rising slowly to a great height like smoke from a fire, as a pale shrouded figure it loomed over the Hill. For a moment it wavered, looking to the West; but out of the West came a cold wind, and it bent away, and with a sigh dissolved into nothing.

Det är väldigt mycket underförstått av den passagen från Shouring of the Shire som Saruman försökte ge tillbaka till Aman, västern, men nekades. Med tanke på att han nekades och att Eru inte gick in för att förbanna honom från tidpunkten (enligt Morgoth) hade han, så långt som vi vet, vunnit Arda som Sauron skulle:

his fall will be so low that none can foresee his arising ever again. For he will lose the best part of the strength that was native to him in his beginning, and all that was made or begun with that power will crumble, and he will be maimed for ever, becoming a mere spirit of malice that gnaws itself in the shadows, but cannot again grow or take shape.

När Saruman dödas,

To the dismay of those that stood by, about the body of Saruman a grey mist gathered, and rising slowly to a great height like smoke from a fire, as a pale shrouded figure it loomed over the Hill. For a moment it wavered, looking to the West; but out of the West came a cold wind, and it bent away, and with a sigh dissolved into nothing.

Det här är nästan identiskt med vad som händer med Sauron :

'The realm of Sauron is ended!' said Gandalf. 'The Ring-bearer has fulfilled his Quest.' And as the Captains gazed south to the Land of Mordor, it seemed to them that, black against the pall of cloud, there rose a huge shape of shadow, impenetrable, lightning-crowned, filling all the sky. Enormous it reared above the world, and stretched out towards them a vast threatening hand, terrible but impotent: for even as it leaned over them, a great wind took it, and it was all blown away, and passed; and then a hush fell.

Från vad Gandalf har sagt om Saurons förstörelse:

For he will lose the best part of the strength that was native to him in his beginning, and all that was made or begun with that power will crumble, and he will be maimed for ever, becoming a mere spirit of malice that gnaws itself in the shadows, but cannot again grow or take shape.

Vi kan vara nästan säkra på att Saruman led samma öde.

Det finns 5 odödliga trollkarlar Radagast The Brown, Gandalf The Grey / White, Saruman The White, Morinehtar The Blue, och Romestámo The Blue. När Durins Banan dödade Gandalf i Morias gruvor uppståndde han sig själv. Det betyder att de andra trollkarlarna kan göra det till. Om Saruman uppstod sig själv vad skulle han göra? Gå tillbaka till Isengard med då hänger Ents fortfarande kvar där? Jag tror inte att Sauron skulle bruka honom längre.