Everybody is expecting a 'Xanathar's Guide to Everything 2', what with all the new subclasses being thrown at us through the UA articles and the alternate class features.
So let's come up with ridiculous titles for 'Xanathar's guide to Everything 2: Electric Boogaloo'
I suggest:
"Xanathar & Knuckle's Guide to Everything, featuring Dante from the Devil May Cry series"
"Fortnite Player's Handbook"