A grain of salt on these bits of information, as they’re from unknown sources.
More likely a couple pounds of salt.
Canon is already heavily invested in one dying market (point and shoot), why would they sink millions into another? Medium Format is a money pit with shrinking demand and marginal improvements in quality. If Canon were to get into the Medium Format business, it would likely be in a very targeted way that focuses on the highest end of the market, similar to their cinema offerings. Even then, it seems unlikely, given that Medium Format is not much of a money-maker for the existing companies.
As for a high megapixel camera. Comparing the sales of the 5DIII and the D800, it looks as though Canon made the right choice in targeting a market that actually exists, rather than focusing on bragging rights for a big megapixel sensor. Canon will offer a high megapixel option only if they can it without much new investment in research, development and production.
On the other hand, surveillance is a growth industry without a clear, well-capitalized market leader. Canon is well-positioned to be able to dominate the market if they choose to do so.