Didn't see a subforum for Story so I'm putting this report in General Discussion.
In the Chapter 1 mission, Discover Midtown Patrol, I completed the mission but the shield agent does not take me back to Hell's Kitchen. He simply says "Welcome to Midtown. ..". I have completed the mission and it shows up with a green checkmark.
Particulars: Went in with a level 27 hulk. Managed to get to the Doom wave before it was taken out and got credit for one kill with one Odin's chest being granted. Returned to Shield agent having leveled to 28 somewhere in the interim. Shield agent has the "Welcome to Midtown" spiel as his dialog. Just in case completed a "Masters of Evil" (?)-the one with Green Goblin, Bullseye, and Rhino - event and returned to Shield agent. Still no luck. Checked Mission Log, and like I said, green check mark by "Discover Midtown Patrol" mission. Returned to Crumbling Brownstones via waypoint to see what the Shield Agent who initiated the mission would say. No dialog possible with those agents. They snubbed the Hulk. Hulk sad.
Addendum: This hulk did much of the story before the side missions were put in. He's completed through "Mutate Genesis" in Chapter 7.