Saudade is a Portuguese word with no real English translation. It's sort of a nostalgia or a homesickness, but really that's not a very good description and you should just read the link.

One exists

Thor, Son of Odin, is still Thor (the person).

Thor is no longer worthy (as depicted in a recent issue of New Avengers) and loses the hammer Mjolnir to Female Thor (who presumably also has a real-name, but I'm not sure what).

Thor, 3000 year old Son of Odin still exists, but epithet of Hammer-wielding Avenger changed hands. It's just weird because unlike Tony Stark or Steve Rogers or Bruce Wayne his superhero identity is the same name as his actual name.

The superhero Thor is just whomever currently wields the hammer.

Fun fact: Cap's been black before.

Not in a 100% canon Marvel-616 kind of way, but there was a miniseries about 10 years ago.

Here's a pretty neat related article about the abandoned cities of the World of Warcraft.

While all my friends have of course decided to use Facebook chat, Snapchat, and the like, all I really wish is that I could get just one of them to understand the simplicity and beauty that is IRC.