With all the new bodies, advancements, and systems pouring into the market, it would make allot of sense for canon to provide an affordable FF body - with a ~$1,500 price tag. This will open the market to many enthusiasts (like myself) who want the high end of IQ - but are not going to pay thousands of $$ on a body - that with the fast moving market - might be somewhat obsolete in less then 18 months.
This would also prompt enthusiasts to invest in L lenses which are geared for FF.