Smash bros 5th dlc

Now before I write anything I like byleth in smash it’s just odd why he is in it I mean all the other dlc were not from Nintendo but byleth is and kinda comfused me for as we had more hype for cuphead as a mii gunner then byleth and not even much people know three houses some guy even thought it was Star Wars so my point is why was byleth here it’s just odd that he is he and the fun base isn’t even happy well in America that is but on Japan people are happy it’s also disrespectful to be rude in Japan so I am just wondering why was byleth added