Possible Sunshine x Splatoon DLC? [Leaked Concept art, weapons, and more]

So at first I saw this tweet 

https://twitter.com/MrGenzoman/status/61...7068857344


So I did some digging and found this album of images(includes concept art, battle weapons and more) 
http://imgur.com/a/8HBoO#0

as well as a thread from 4 chan 
http://boards.4chan.org/v/thread/298598004#p298600716

The one I thought was off was of the male inkling and the clothing, but apparantly there is concept art like that out there according to 4chan, just in the prisma guide:
http://www.primagames.com/media/files/ne...quality/80

I read through it and I don't think OP of the 4chan thread said anything about it being at E3, but my god this has me hyped. 

What do you think? Do you think this is real? Whether it is or not would you be stoked for this? 

EDIT: Etika covers over this as well! https://www.youtube.com/watch?v=FABEIJWfa6c