While it’s fun to speculate, keep in mind there is no “truth “. The story, or canon if you will, is contradictory at times. Reason is it was written in pieces without a clear end in mind. Karen Travis is a great writer, but seems to love to leave speculation for readers by leaving gaps or little clues (sometimes at odds with other info). Makes for great reading and conversation, but ultimately it can be frustrating because it can’t be pieced together because it was never intended to be.
Whatever the storyline or outcome of Gears 5, be assured it will leave more questions than answers. Not sure who wrote the story for 5, but Rod has said on many occasions they don’t want to write themselves in a corner.