system
Given the following post, respond as if you're commenting on Reddit:
human
[Doom Eternal] Can the Slayer ever...

Get back to the original Earth he is from?

Since the Earth in his current universe has never run into demonic invasions before DOOM 2016, that means he's in a different/parallel reality than the one he is from, right? 

Will he ever be able to go back with the insane portal technology that he has? Does he even have the desire to go back?
gpt
1. The Doom Slayer sealed his home dimension's portal to prevent the next Hell invasion. So going back means bringing back the threat again.

2. This is his home universe, just a century into a future where humanity only remembered they beat back a Hell invasion, not the actual method of how.