Is the Flash Sideways really a flash sideways

on the day of jugheads detonation we know have discovered that there are two timelines created from that point.

What if the timeline with the island above water is the Flash Sideways. My reasons for this is as follows 1. There is no evidence that a nuclear bomb ever detonated on the island 2. MIB is trying to leave this place. What if he is trying to leave the timeline knowing that it is a false timeline 3. Richard believes that are in Hell. Maybe they are

When Jughead went of they were all blown into the Sideways timeline while the original timeline changed to accomidate the detonation of jughead.

Flight 316 also somehow was transported to the Flash Sideways timeline moments before it crashed. hence the 2008/2007 issue.

What does everyone else think

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