So I'm not a modder myself, but I stumbled upon a few Buster sword and Masamune mods for Skyrim today and thought it would be cool if there was a full blown "Cloud in Skyrim" mod.  It would be cool to give the game that Cloud-in-FF Tactics feel.  
I also saw the 
Midas Magic mod that actually creates brand new spells, not recycled from the game files, which suggests to me that Materia spells could be created - and the thing is that the Creation Kit isn't even out yet!  When it is I think the sky will be the limit.  Good/bad idea?