The only reason I bought WD: Legion is because a) it came with the complete edition of WD1 and b) it had bloodlines. I haven't spent a second in the main game, but bloodline is fantastic, and while I understand that Aiden's story was essentially concluded in 1, Watch Dogs 2 having nothing to do with him was disappointing because he's badass.

Back on topic though, bloodline is Watch Dogs: All Stars. You get to see grown-up Jackson, you get to play as Aiden, you get to play as Wrench and you get to see ALL THREE interact with each other. It's pretty nice. If you needed a little bit more WD1, here's it.