Kano already has some background info about the raids so why not put on the boss page just before you select a raid a little info bubble on the boss icon and when you click it itl tell you the lore behind the boss, would be a cool little feature. Made an idea similar to this a while back that was saying to put the lore for locations but think that was forgotten can grab the thread if anybody is interested though and post it in here
Good idea but I think some of the needed raid boss improvements should come first. but still would be a nice touch.