yes I was about to say. all of the forerunners are dead. I seriously thought that the planet was either earth or reach and Master Chief just landed on it. But cortana said that it would take a long time to get a response out so that means that they are most likely very far away from human civilization. Whatever planet he is going to land on will be huge and my best guess would be that there is something else the forerunners knew about like the Origin of the flood and how to stop them, just at the time... they couldnt.... something along those lines, but im very interested in what comes next. And also if you remember in the first halo game 343 guilty spark tells master chief that "The last time you asked me the answer was no, And it still is" That question has still been unanswered as to what he was talking about. And my best guess is that 343 guilty spark knew about something else that Master Chief wanted to do that he wouldnt allow him to. I am very interested with that they plan to do on that topic, considering O connor talked about it in one of his interviews.
[Edited on 10.03.2010 8:28 AM PDT]