Yeah, it doesn't have to be the same, make some new spells up and make him do things differently. Besides, isn't that what almost everyone does here, bitch about things in the series being the same?
Anywho, as much as I love the 2D Side scrollers I still think it would be a bit lackluster as the most important event in the story to be in 2D. Of course, they would need it to be good 3D to make it phenomenal.