Technically both trilogies are prequels to Halo 4, with Kilo-Five being a direct sequel to Ghosts of Onyx and Halo 3.
Kilo-Five is bridging the gap directly between Halo 3 and the fiction up to that point and Halo 4 and the Forerunner Trilogy is filling in the larger picture and fleshing out a larger narrative - and will somehow also be tied into Halo 4.
Right now we have no clue how the Forerunner books tie into Halo 4. We'll definitly understand more when Halo 4 comes out and the final Forerunner book comes out but that will be well after Halo 4 is out. Same goes with Kilo-Five.
The concluding parts of both books will be, I imagine, vitally important to understanding the context of how everything is tied together. I'm simply questioning if having both final parts of two whole trilogies come out after Halo 4 is a good thing considering how closely the entire fiction is tied together now.
Think of it this way. Say in five years time and fans are re-reading and replaying the books and the games. Should they read the two trilogies before playing Halo 4 or afterward? Or only read two thirds of each trilogy and then play Halo 4, then finally finish each trilogy?
I think the main reason why we aren't getting the final parts of each trilogy is because the ending must, in some fashion, spoil something from Halo 4 that they want to keep from us until we've played the game.
In terms of bridging content, I'd rather have that content tell a full and complete story in the gap it's suppose to be set in and have it complete before the next game.
The Forerunner books were suppose to be already out by now. Things change and evolve and schedules get pushed back. Uprising, as an example, was originally meant to out before Halo 3 and that didn't happen.
