It is, and this is the same price as a normal Switch just with extra Fortnite "goodies"

The original game didn't include the Battle Royale. BR was F2P, but as far as I know, the original game is still a full game which one has to pay for.

I don't know if that's with the bundle, or if its just the BR mode in a pretty box.

"The Nintendo Switch: Fortnite – Double Helix Bundle includes a Nintendo Switch system, 1,000 V-bucks (in-game Fortnite currency) and the Double Helix Set, consisting of a unique Character Outfit, Back Bling, Glider and Pickaxe. The included V-Bucks can be used to purchase a Battle Pass, which unlocks additional in-game content, or can be used to purchase other in-game items."

not free content that you are getting for free.

Does Sony have a marketing deal with Epic for this game? I just thought it was marketed by Epic towards PS heavily because Xbox got PUBG, and Epic saw an opportunity to play the console war field and pit itself against PUBG in that way. I know Sony had a bundle, but bundles don't require marketing deals.

You can always have nope.

Shelf advertisement is key here. How would you think a kid would react if they saw this on store shelves while at your typical big box store with their parents?

Also, it isn't worthless since it includes a $10 in-game currency (which is perfect to get a battle pass) and an exclusive skin.

it's got exclusive goodies though. And those aren't free.

It includes $10 in in-game currency [you can use that to get the battle pass] and an exclusive skin.