I'd love for there to be a DD2. And though I was initially turned off to the idea of Ben as Matt Murdock, watching the film and the DC over and over again got me used to seeing him as DD. He did pretty well, actually. And I would really like for him to return for a DD2 (mainly for continuity purposes, because it annoys me when they get different actors to replace the earlier one in sequels. The Batman movies are an exception, but I just hope Bale stays as Batman).
I would love for them to adapt "Born Again", but seriously, that should be saved for like part 3, mainly because Matt and Karen's relationship got no focus time in the first film. Part 2 should have him facing off against Typhoid Mary and the Owl, with Karen playing a love interest to Matt, and Mary creating a love triangle, with Typhoid Mary falling in love with Daredevil. All this would be caused by the Owl who is trying to move in on the Kingpin's territory, which could lead to one big gang war (and Urich should either be narrorating the whoel story or have him play a more important role).
Then DD3 could adapt "Born Again".
Or, if they must, they could reboot DD a la "The Incredible Hulk" (or "Evil Dead 2"; not necessarily a sequel, but not an entirely different film). Have this film actually show how he became The Man Without Fear. Show how it was when he first got on the scene, how he first met Foggy (not sure if Elektra and Stick should be thrown in), how he coped with his father's death, how he made his costume (I think Melvin Potter should be thrown in there and maybe even have him become the Gladiator). I wanna see how the city handles this new hero on the scene. How will they react to a guy dressed as a devil protecting their streets? Have Ben Urich in there play a more important role rather than just some annoying stalker reporter.
And if the reboot does well, continue on from there.