i have just rewatched the first 3 seasons and something has occured to me.
1. What if Simon escaped the loop? There is no reason he would return to the passt other than for the romance between him and Alishia. If he wouldn't had returned to the past at the end of season 3, there would be no difference whatsoever. She would've died anyway. Future Simon always said he wouldn't let Alishia die, but he should know it is bound to happen.
2. What if the loop is moved forward. There have been many moment where the crew barely escaped death (besides from Nathan), and it is the work from an earlier future Simon, and these events have been fully implemented into the timeline. If we take this into account, you can say that Alishia survived GTA dude anyway, and he saved Alishia from the ghost instead, moving the loop forward. I never thought it would be possible, but with the return of GTA dude, it opens perspective. Maybe everything has taken place and he never went to prison. Why would someone who killed that many people be relesed from prison that early. It hasn't been a year since the storm. And if the police would've known about the power. He were to be treated while being in prison, and the whole world would know about those super powers.
Seeing Simon return in the final now seems plausible for me. And I hope it happens. After season 3, the show became less good, primarily because it missed a global storyline (like Super-Hoodie). Season 4 looked like the 'Rudy-show', a spin-off set in the same world. It didn't have any elements from former seasons.
But wait! Except GTA dude!
And maybe Alex brakes the loop by shagging Simon,... twice. (the last power goes away, and that's the immunity, and yes it would go away, or else it would've never been possible to transfer it from Seth)
I thik it is enough to fantasize about for one night.