I've read issue #3 and enjoyed the backstory provided by Casey about his relationship with his Father. The how's and why's of him putting up with the drunkard abuser.
I'm also curious to get more on Old Hob, how he came to run a street gang and what ties he may have made in the past 18 months since the transformation.
I do like that Hob is this mystery they are giving us out of the gate when the obvious crutch would've been to use Shredder. That of course is going to make his appearance when it does happen that much more anticipatory.