Actually, I've been thinking of a few more plots:

The Numeneorean Civil War
Defense of the Shire during the War of the Last Alliance  
Defense of the Shire during the Fell Winter
War of the Kin-strife in Gondor
Migration of the Halflings to the Shire
First Invasion of the Easterlings
The Great Plague
ARAGORN ZOMBIES (sort of.)

Idk about Hunt for Gollum, since lore-wise, only Gandy the Grey and Aragorny went on it. 

Oh, and if anyone wants some info, check with me. I have a copy of the Silmarillion, plus Appendixes A-F. The appendixes contain family trees, timelines, calendars, and just about everything that makes the existence of Middle-earth sound as plausible as the dinosaurs. Thank you, Mr. Tolkien.

*attempts to hide nerdiness*

O_O