This book is full of shorter stories.  I wish it was just one story.  As mini-stories it gets repetitive as it keeps telling us the point of the book - to do team ups with new heroes and past heroes.  I think any fan of the original series would like it.  Or even fans of the anime, but I was less than impressed.  It almost feels like US 8x8s where they just regurgitate a tv show on paper.