Not buying into the 1d5 rumor, as they barely just got the bugs out of the 1d4 over the last year and they won't release a new sports camera this soon.
Think about it. Which cameras are now missing from their lineup?
Full-frame pro-level and full-frame consumer (cheaper than 5d2).
The announcement is one or the other. I would lean toward FF consumer release now with 5d3 and 1dsIV next year.