At the end of season one, you are left with many questions, and a few answers to questions that have not yet been asked. But my theory is that when the producers found out that flash forward was being canceled they purposely made the series to end with questions and answers as to an easy transition to the show never airing again. Watch the final flash forward of the world, and think, if charlie says that they found "him", who i guess is clearly Mark, then i doubt that they would wait until the setting 2015 (i think that's a date on a birthday banner. but not actually i n 2015, maybe like 2011 or whatever). yeah, what do you think? if i should explain something....