Oscar the Grouch peered out from his rusty, weathered trash can, eyes narrowed as he watched the garbage truck rumble down the street. His heart pounded with a mix of anger and anticipation. "Today's the day," he muttered to himself, clutching a knife in his hand.

Oscar sprang from his bin with a ferocious snarl, brandishing the knife as he lunged at the garbage man. He was fueled by the memory of his brother's fate. "What the—!" the garbage man exclaimed, stumbling back in shock.

Spider-Man swung into view, landing nimbly between Oscar and the garbage man. "Whoa, Oscar, let's talk this out!" he urged. Batman emerged from the Batwing, his cape billowing dramatically. "We have the evidence, Oscar. Justice will be served, but not this way."

Ernie, Bert, and Elmo looked on, their eyes wide with disbelief. "Oscar, we had no idea," Ernie said softly. Oscar lowered the knife, his heart heavy with grief. "He was my brother," he whispered, tears glistening in his eyes.

Oscar retreated back into his trash can, deep in thought. "I just wanted him to pay," he murmured to himself, feeling a mix of relief and sadness.

The garbage men returned, their faces earnest and apologetic. "We promise, Oscar, we'll never harm another Grouch," they vowed, and Oscar nodded, feeling a flicker of hope for the future.