With a large screen iPhone 6 Plus, much lower sales this year on the rMini vs the Air, and lack of any rMini 2 leaks (lots of Air 2 leaks), I don't think they will announce / upgrade the rMini this year. Similar to the Touch vs iPhone, Apple most likely wants to keep the rMini hardware one generation behind the iPhone 6 Plus.
While you may very well be correct, I don't think we can really look at a lack of leaks as sufficient proof of non-existence. There was next to nothing about the 6 Plus, especially compared to the 6 leaks. Given that a rMini refresh would almost certainly have the same form factor, the only update with be internals and the volume button recess.