From what I see I can definitely say now that Lean is the main antagonist. I doubt they will show another antagonist like Arthur out of nowhere. Although I didn't want Lean to be the main antagonist it seems highly likely so....I see the November month will be like the "last" month for beys in the anime to release. The remaining 3 months will be the perfect time to release like the other legendary beys according to the manga. I do think the final arc will be between Lean vs Hyuga and Hikaru... or a mix of them three.
After I did read the manga and observed the images it just makes sense that this character is the final boss. Delta never had a look of what Lane has nor did Aiga he reminds me a lot of Shu and Lui during their days as the antagonists.
So Lucifer is the final boss after all....way too predictable but I still feel like it's not it November is usually not the month of main final antagonist but considering how Lucifer ev. is rumored to be in November booster which is a defense type I can tell how they will merge every upgrade on November...oof I expected more from Superking. I hope the final arcs are really intriguing than what we have in the Legends Festival currently going on. Because I mean in the long run the real spicy battles we would just surely expect to see are Aiga vs Lean, Hikaru/Hyuga vs Lean, Valt vs Lean, Shu vs Lean. I doubt that we are ever going to be see Free or Lui battle Lean again.
If Lean just straight up beats Valt, Aiga I'll be mad af. If Shu goes against Lean which I think is going to be World Spriggan's debut he should win because Shu is still like the mentor figure from Cho-Z. Similar to how Shu tried to show real resonance to Aiga. I can see this happening the same with Lean's case since it is highly likely and 2. Lean is Shu's "student".
you better watch this if you want nostalgia over these years. MEP Legendary:
https://youtu.be/BxXAlIpZ-ns