LOST Tonight (2/9) - "What Kate Does"

[Fox 6]

Originally Posted by Dylflon

Incorrect. It is an alternate reality. Showing you what would have happened for shits and giggles makes no sense narratively, especially since it's the final season.

Blowing up the island with a bomb caused an alternate timeline that stems from that moment onwards. I'm pretty sure the producers confirmed this.

Not to mention that if it was just showing what would've happened, why is everything slightly askew? and why would the characters seem to have weird reactions to Aarons name, jack meeting desmond, etc.