he is at minimum universal by the lore lol. I have no idea why they would make that claim. If they wanted to say the lore was invalid because on-screen feats didn't match or something, I would at least understand that
modern dooms >> classic era dooms
by the time of doom 2016 doomguy was legit several eons old, the dgai and the majin realm, as seen in the doom reboot series have had an eons long arms race
davoth was revealed to be the first being in existence, and is responsible for creating everything in the doom multiverse, all enemies, including the lel icon of sin draw power from him
dslayer is a clone of davoth, after he went into the divinity machine, and became imbued with his power
because of that after he destroyed davoth, the davoth that got overpowered, was implied to be semi nerfed, and after that, dooms went into a comatose state, since all his power came from davoth
in other words, at least universal+ ds is the most minimum version, with him beating semi nerfed davoth, if we go by that, if we agree with davoth being at his peak, multiversal dooms, you get the meaning, either way
even on dark ages, even in his intro of the nu game, when dooms fell on the bfield, he dropped like a mini meteor, literally parted a cloud, as a side effect (low city levels at most minimum), as they dropped him down to the ground, and he was unscathed
now, when he uses his weapons, he scales much higher, when he uses his atlan mecha, its literally dooms's lifeforce/energy connected to the atlan mecha, so, whatever power/charging the mecha unleashes, it aint of its own power, it's because of doomgai's inner force/energy, that power ups the mecha, and does, those feats
in other words, in a way, doomgai becomes about mountain sized and fights monsters of that tier and even stronger, more impressive cloud parting feats = some degree of country levels, from other monsters have been done, including beating lol cosmic cthulhu lookalikes, several times they fought in this game, and the final boss fight is even crazier
lore wise
it goes like this
- Doom.
- Doom II.
- Doom 64.
- Doom Marine is found by the Night Sentinels from Argent d'Nur, followed by the various flashback sequences in Doom Eternal. He becomes the Doom Slayer.
- Doom: The Dark Ages.
- Doom (2016).
- Samuel sends the dooms away
- Doom Eternal
- TAG Part 1 and 2
doom 3 is it's own timeline