The answer is yes! They mentioned it at E3 when they first showed off VC. Judging by the current rate of VC releases the next console will continue to release VC where Wii left off.
The bigger question is... Do we wait 5 years, or 15 years to get all our VC games? Do we have to download the other 75% on a new console, or will they get them all out before then?