There are strong indications they will, and there are strong indicators they won’t. I wouldn’t be surprised either way.
As for the difficulty involved in putting it in a DSLR, seriously? Canon register more patents each year than almost anybody, if they wanted to do it they could but for the EF system they chose lens stabilization as their preferred method of stabilization. The big benefit for lens based stabilization for DSLR’s is the fact that you get a stabilized view through the viewfinder, you wouldn’t if it was sensor based stabilization.