I like the idea of Terraria for Wii U and 3DS, but there is a problem, as ElTipsta said
"The 3DS version will probably be severely compromised Because of the console's limitations"
I do not see much sense that this game be for 3DS because not have many controls as a XBOX a PS4 / PS3 or a WII U and various controls are needed because there are many objects in Terraria they need a certain button to work