Is Kayaba's Admin Account a part of The Seed Nexus?
No, it won't. The reason Kayaba's admin account works in ALO is that ALO uses the database of SAO. ALO is actually SAO with improvements here and there, changing the textures, adding flight system, etc. That's why Asuna is there. That's why when Kirito logged into ALO, he retrieved his stats and items, though, due to the change in game resources, his items are mostly broken.

So, it is reasonable to say that a game created from the Seed would not have Kayaba's admin account, since it doesn't have the same database. There is a chance that Kayaba would hard code his account into the Seed's program, but I don't think it is likely since hard-coding is a bad practice.


StackOverflow: What is your attitude towards hard coding?