There are entire libraries of coffee table conversations about the multiverse. A lot of them explore the what if and are usually fun over a couple of drinks. When its done professionally however… On second thought I think I’ll not go there this time around.
There is an online comic that is devoted entirely to the bizarre occurrences of the multiverse: it is aptly called “Scenes of a multiverse“. I recommend it highly. Usually you can expect intelligent Hamsters and evil geniuses running amok. The one today is particularly apt if you’re up to snuff on the inner debates of academic multiverses: that it is a dream of something (aka, the simulated universe, aka The Matrix) and that there is no testable prediction, but postdictions aplenty. Or at least one.
If you’re in the mood for it, you might want to read some of the books by Michael Moorcock. They give you a different view of the multiverse.