Hypothesis B gets you into the grandfather paradox, and it's more lazy writing. Why would they need Tucker to go back in time to build the machine in the first place? Not to mention, it doesn't explain how he's in a totally different solar system. It being used to create a singularity, a singularity that can be manipulated. Manipulated incorrectly in this case, resulting in their sudden house guest appearing out of nowhere. One wrench 🔧 I have with my theory is. During his discussion with Tyr, Tyr said something like, "that's not possible, he would've had to make." Almost like he's seen the Mæron do something similar before, and he knows the cause and what the future holds for Tucker and him continuing being not dead 🤔 ☠️⚰️💀. Also it doesn't explain his ability to understand them, but they don't understand him. My theory is Tucker, somehow combined with a crew member that died due to 'the hum.' Maybe only parts of his mind were merged into Tucker's which would explain his speech ability and why he can't speak their language to them.
I like this theory where Tucker's mind could have merged with Carain's during his journey via Mæron. I even think that would explain the hallucinations and visions. Could the mascot be a personification of Carain's mind that merged with Tucker? Could the visions actually be memories of another person? I think the next update will bring us some answers regarding this. I really never tire of how you think (although it's a bit confusing sometimes).