First off, post any and all future theories in one of the theories threads. They are better qualified to discuss this theory. Other than the fact that, iirc, only 300 years are between Sazed's ascension and Wax and Wayne and that SA takes place after both of them (again, someone should fact - check me here) it is a reasonable theory.
Also, welcome to the Shard! Have a complementary upvote and a warning to stay away from any and all food items offered (especially the cookies)