The Case for Why HOO should have had a slightly bigger time jump post-PJO.
Okay, one thing that never sat right with me in the PJO universe was the quick turnaround before HOO. The fact that Percy disappears just a few short months after winning the Titan War means that our heroes do not have enough time to enjoy some peace, and there was realistically not enough time for tensions to brew for the Giant War.
Let's pretend there was a time jump of 2 years. Percy and Annabeth are now 18 years old. They are older, stronger, and have only become deadlier since the end of the Titan War.
In this time, Percy and Annabeth have become even more prominent figures at camp and helped manage the influx of newly claimed campers. Likewise, Annabeth has made great progress in rebuilding Olympus. But there is an undercurrent of unrest and hostile murmurs from Olympus. They begin to notice less and less communication with the gods. Suddenly, Annabeth has a harder time getting access to Olympus to do her work. And the flow of new campers slows to a trickle. The gods are upset at having to abide by Percy's demands and they are fearful of his power, and now there is time to explore this. (Remember he has had the Achilles curse for two years now and only gotten more in sync with his godly side!)
Then Percy disappears and all hell breaks loose. The new timing only adds to the drama, because at this point Percy would have been at the brink of going to college only to have his life derailed again. (Callback to Beckendorf who was also 18 and college-bound but forced to set it all aside.)
Their ages also bring more interesting dynamics to Percy and Annabeth's relationship with the Seven. Being basically adults among a bunch of young teens means that Percy and Annabeth have an even greater leadership role on the Argo II. Instead of having a rivalry with Jason, I think Jason would look to Percy and feel insecure, thinking that he could never compare to what is essentially a war veteran at this point. And overall, I think the Seven would admire Percy and Annabeth but also be secretly afraid that they would suffer the same fate of having godly affairs meddle with their futures.
End of rant! Please comment with your thoughts and further ideas!
Something else which occurred to me: what if the events of HOO also spanned 4 years like PJO? It never made sense that the “bigger” war was resolved in less than a year or so. This would also put Percy and Annabeth at 22 by the end of the Giant War. This is a fitting end because we met them at 12, then followed them for 10 years and 2 major wars. At 22, I think Percy and Annabeth would be more than ready to retire from “active duty” and move on with their lives, and we could see a changing of the guard with the younger demigods.



