The bokoblin idea is hilarious, and I absolutely love the Colin idea.A spin-off starring a common Bokolobin from the TP universe. He starts out pillaging villages along with the other bokos but rebels against King B. after falling in love with a beautiful human maiden, lol.
I could also see Colin from TP as spin-off material, because he equips his own sword and shield at the end of the game and he idolized Link. I was thinking up a story idea where an older Colin postpones his inauguration as Ordon's chief to search for Link, who's gone missing. He meets princess Zelda and rides Epona maybe even finds another way into the Twilight Realm, blah blah blah, and it's all really heartwarming because he always wanted to be like Link, and now he's fufilling that dream. Both Ilia and Zelda (and maybe even Midna) tell him he reminds them of Link, which makes him tear up.