Dear Mr. Bear,
Halo's fiction has been one of my favorite of all time. One of the greatest thing about the series as a whole was the awe, wonder, and mystery that surrounded the Forerunners in and of themselves. I am in no way trying to disgrace your books, but expanding on them and retconning previous literature that Bungie had created seems to put those previous feelings aside and take away one of the best things about the fiction. If you really need to change a lot of the fiction throughout your story's, please instead make them coherent and precise with the literature you built off of, for example terminals found in HALO 3, and the plenty of other novels created. I also advise keeping the "awe, wonder, and mystery".
This is must of a question but rather a suggestion, I just hate to see one of the greatest things about the science fiction I love most disappear into the night.
From: Greg Bear
All good thoughts, Lucas. We did our best to mesh the universes and carry on faithfully. Have you read the books yet? If so, happy to listen to your further thoughts!