True. We need confirmation to this.
This is from NoE PR:
Squids Odyssey (The Game Bakers) - €12.99/£9.99
Squids Odyssey is a unique mix of action strategy and RPG: build your team of Squid heroes for epic turn-based battles against corrupted crabs and shrimps! Steev and the rest of the Squids are in danger! An infectious black ooze is corrupting their world. The band of unlikely heroes need to fight back to save their kingdoms!
Special offer:
If you downloaded Squids Odyssey on Nintendo 3DS, you can download Squids Odyssey from Nintendo eShop on Wii U for free! (Your Wii U and Nintendo 3DS must be linked with the same Nintendo Network ID.)
I'm adding this to the OP.
The way it's worded sound lweord because the Wii U version is already available on the eshop since a couple of weeks, while the 3DS one will be available this week. So, let's wait for details about how it works (will I be forced to download it on the 3DS first?)
Seeing as Sal Romano leaked that Smash 4 was gonna get character DLC, I can see why Nintendo decided to add Cross Buy now.
I don't think that Smash will be crossbuy at all. They are two different games, in terms of contents and engines, and assets, and so on. I can see a cross-promotion tough, considering that they already did great cross(game/platfrom) promotions for digital purchase recently (the W101 30% off with Pikmin, the Free game with MK8, the Pushmo World discount). Maybe in Smash DLC characters could be cross-buy, even if the games aren't?