The Star Wars/Republic ongoing comic kind of did that, didn't it? You could jump in at any time, there's stuff like that Ki-Adi guy having a strange padawan and then Mace is the main character and then that Vos guy oh it's that Vos guy again, I know him from some months ago... you get the idea. It's kind of one story, but unlike KOTOR's 35 initial issue mega arc or Legacy's 50 issue run (we wanted to have 150, you know) you don't really need the back story. But you'd go back and read more about the same characters if you enjoy the arc you jumped into. But funnily enough, I started reading Legacy with issue 8 or something like that because I didn't want to wait for trades anymore. Ordering the missing issues, of course, but reading #8 anyway, thinking about all the good old times when you simply read something out of chronological order because you didn't have a manual on how to read what.