Stewie's broken and rebuilt that time machine a few times already so...
But if it's true I will actually be really sad. This show, more than any other, has kept me laughing consistently for 11 years. And most of those laughs came from Brian and Stewie's interplay. I can't imagine it without Brian.
And for those watch the show, this quote seems highly unusual:
As much as we love Brian, and as much as everyone loves their pets, we felt it would be more traumatic to lose one of the kids, rather than the family pet Ok, maybe in real life, but in this cartoon NOBODY would be traumatized if Meg died. Assuming anyone even noticed she's gone I think they would probably be relieved that she died. It's a running joke for Pete's sake. (pun intended)
....but the world goes 'round