'Who in a battle literally created the universe.' The Diablo Universe in question is literally two places at the time. I don't even think you can call those two places proper planets. A third comes later. Compare that to the Warcraft universe which is an actual, you know, universe.



'The Light and The Void collide and created the Warcraft Universe.' I see you're using Warcraft Chronicle. I'd be careful about that, because Chronicle retcons a whole lotta stuff and has some logical... quirks. I'll show you one later.



Not to mention I'm not even certain P.E. Diablo was on par. In battle the original PE create the universe right? Well then if PE Diablo was that strong, then the battle with him would have been a little more devastating than some broken furniture. That's not even just game mechanics. If PE Diablo was that strong, Blizzard would have written him as that strong. But they didn't. PE Diablo < Original PE.



Saying 'isn't even capable' of standing against the Old Gods is rather biased. It's like saying PE Diablo can't even stand against a nephalem. By the way, I'm fairly certain there's something in Chronicle - the thing you used earlier - about Sargeras killing a bunch of Void Lords in one hit. Also, destroying an entire planet by swinging his sword.



Nothing Diablo OR PE Diablo ever do comes even close to Sargeras's feats. PE Diablo tried to cause an apocalypse by getting close to Important Artifact of Hope and sabotaging it. Sargeras causes an apocalypse just by being there.