Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: Melissa Benoist and Grant Gustin HAVE to do a musical crossover episode! #glee origins #arrowverse
This tweet contains emotions: 
anticipation, joy, optimism