Post-Joker speculation was probably the most wild times of speculation. There were so many possible characters, it was crazy. Though later on it was dominated by Hero talk, as Nintendo themselves accidently leaked Hero. Though for some reason I was a firm believer that Hero would never be in. Hinata and tehponycorn put me to my senses.
I took a break from speculation after Hero and Banjo were revealed, so I am unsure of what post-Hero and Banjo speculation was like. But speculation would still leak on from where I was at, so I know a bit about the following:
Post-Terry speculation was a buildup. Everyone was expecting a huge third party to end the pass, such as Dante, Master Chief, Doomguy, Reimu or KOS-MOS, but then boom, Byleth.
Post-Byleth speculation was probably filled with a lot of Byleth salt, but it was revealed that Fighter Pass 2 was a thing, so a lot of people speculated about that. First party discussion started to become more prevalent. Then it was revealed that an ARMS character would be in. I was still in my break, so I missed a lot of that, but I am sure it was pretty dreadful.
Post-Min Min speculation is where my break ended, and where I began to speculate again. It was filled with a lot of first party debates, like Rex and Pyra. Third parties were also on the rise, and people started talking about Crash, Dante, Monster Hunter, Hayabusa, Master Chief, and more. Also, a lot of Geno talk. I would say Geno, Hayabusa, and Monster Hunter were the most speculated on characters.
Post-Steve speculation I decided to take a break from. I don't really know what happened here.
And now, Post-Sephiroth speculation. Probably going to be a lot of Monster Hunter talk, and now people are talking about other characters from third parties represented in Smash with at least one character, like Eggman and Chun-Li. Also, it may get a bit toxic, as Sephiroth hurt Geno's chances a lot to the point where his feat is basically sealed. A Geno Mii Costume will end the situation quicker.
I think one thing we need to learn from this is that it is nearly impossible to predict what Sakurai will choose. Our rules collapse every single time a character is revealed. Our predictions are shattered too. So Scoliosis Jones and Uni made a great point that we need to be careful on over-speculating about Chun-Li and Eggman, as this does not mean they are guaranteed.
We have three characters left. After that, I am permanently done with Smash speculation. Overall, it has been a very interesting ride, and STEEVE! :D