Be careful what you wish for...

[Hookbill the Goomba]

Originally Posted by The Elf-warrior

I wish Saruman hadn't turned bad.

Your wish is granted. He takes up Tennis instead of becoming evil. He turns all of Isenguard into a giant Tennis stadium and plays endlessly against Gandalf and the other Istari. Gandalf is distracted by the final of the Saruman Cup and does not warn Bilbo about giving away the Ring and so takes it to Rivendell.
Sauron attacks Rivendel and Bilbo is cast out for being selfish. The Dark lord regains the Ring and launches an all out attack on Middle Earth. Gandalf doesn’t finish his game against Saruman and returns to Valinor and sulks.

I wish The Balrog had decided to be civil and not tried to kill the Fellowship. Offering them a cup of tea instead.