Hudson recently spoke to Cubed3 about Deca Sports and the possibilities for the future:

Pepe stated, “We are exploring ports to other platforms. The DS being one of them. The controls and mechanics need to make sense though as the gameplay within centres around both of these.” 

“In addition to this it was revealed that more Wii Deca Sports will be coming. When asked about whether a Wii sequel would come or not, Pepe’s response was a simple“Definitely”, with him encouraging readers to head over to the forums at the official website and express their opinions on what sports should be included next time.” 

Looks like we’ll be getting more Deca Sports action for both the DS and Wii!

Link