Standing with The Man
The synopsis for The Mandalorian talks about a lone gunfighter on the Outer Reaches of the galaxy away from the New Republic. Additionally, Jon Favreau has revealed this show will take place five years after Star Wars: Return of the Jedi, which is quite a ways away from The Force Awakens era. While it's not an impossibility to see characters from the new trilogy, it feels more likely older characters will make an appearance.
The synopsis also name-checked characters like Jango Fett and Boba Fett, and likened the gunfighter to a character similar in that regard because he's a warrior. This might be because all three characters are tied to Mandalore, which explains the title of the story well enough. Is this gunfighter directly related to Jango and Boba, or is the connection more based in the fact that most Mandalorians are warriors, mercenaries, or bounty hunters?