Since the Nintendo Switch is not a Wii U or Nintendo 3DS successor machine, you can not play with Wii U disk software and Nintendo 3DS card.

Rumor The Nintendo Switch has a maximum battery life of 3 hours...

What the developers say...

Ubisoft - Ye,s we will...

2K - Yes, we will...

Bethesda - Yes, we will...

EA - Yes, We will...

SEGA - Yes, we will...

NIS - Yes, we will...

Epic - Yes, we will...

Square Enix - Yes we will...

Bandi Namco - Yes, we will...

Telltale - Yes, we will...

Unity - Yes, we will...

Warner Bros. - Yes, we will...

Atlus - Yes, we will...