I think he is going to help the "bad" guys. He saved Nacho's ass (Nacho Libre!!!) on this one. Tuco and the gang has some heavy drug deals going on, they are going to pay top dollars to Jimmy keep them off the jail. Kind of falling on that path; is either work per $700 a case or several $1,000s per case. He is going for the cash because needs it and is afraid if he does not some bad will happen (brother?). The name change, I think it has to do with protecting his brother. Mike is going to leave the Parking Attendant job and join Saul, he seems to have a grudge towards the Law Enforcement (bad experience) and he is going to come handy on cleaning up messes (crime scenes).
My take on how the show on how is going to end is by taking his own life. Episode 1, to me, has the look and feel when someone is not happy with life and remembering the past before commiting suicide.
What would be nice if the producers make another series with Jessie. He knows Walt's formula and he is the only one in the world that knows it. What if, he gets cornered/forced somehow and he start cooking again; take them someone like Walt did (Jessie) and screwed someones business like Walt did with the Mexican cartel.