Possibility of adding a dragon to BG:EE?

Hey guys I know this question has probably been asked before but I can't find it anywhere.

My question is since BG:EE is using the BG2 engine would it be possible to add a dragon in some user created region to battle for an artifact level item for an extra challenge quest? I noticed that using EE keeper you can change your appearance to that of a dragon so I thought it would make for a pretty epic side quest to mod in an area with a dragon who held a custom item of immense value.

Thanks in advance.