Glee & Arrowverse Crossover: Worlds Combined

Glee and Arrowverse merge into one universe, and who stands behind it all?

"Yours truly, Music Meister." — Music Meister

Arrow, The Flash, Supergirl, and The rest of the Arrowverse come together with the Glee gang to discover each other and team up to figure out what is going on and what they want to do about it. Will they accept the change and co-exist, or will they try and change back to the good old worlds they lived in before… Is this a blessing or a curse by using Music Meister?