It’s been an obsession for WWE to try and make SummerSlam somewhat of an equivalent to Mania for several years now. I don’t think it can or ever will be though, and most fans appear to agree, but TKO wants that money, money, money.
I dislike Mania being 2 nights as well, not everybody needs a match at Mania now that most talents aren’t getting a cut of the gate if they work the event. I do get it’s WrestleMania and most talents have dreamed of being on it, but to me, it feels like a lot of filler sometimes.