It wasn't pretty obvious at first but there has been always a hint about how the ending of that Annual affected Kyle and we finally see the ramifications of such event for him. The Source Wall obviously altered his powers not only in a positive way but also in a negative one and it's great to see how it was manifested in this plot. I have more thoughts.
Excellent Annual and creates the next stage of development for Kyle Rayner. What are you waiting for? Go check it out!