>>150923958 (OP)
There is no unifying theme. Every Absolute book has the 'heroes but without all the initial advantages' thing going on.
Ultimate, in theory has the whole 'Maker messed everything up' but you can't really feel it sometimes. Ult. Spider-Man barely deals with the Maker. Ultimates should deal with him and his council, but the book is more concerned with grassroot heroism. X-Men could be happening in literally any other alt. universe. And so on.
Also, Ultimate Incursion was such a misstep.