Looking at it from a different side, which FF DSLRs with OVF have been announced lately? 1DxIII, D6 and .... ?
Nikon D780 too.
To be fair though, not a lot of full frame bodies have come around to their typical renewal cycle recently either, so we shouldn't expect release of those bodies until they're well past their expected date. Many full frame bodies are released on a largely predictable schedule with some exceptions. Let's look at some of the renewal cycles to see which bodies should have appeared by now and haven't:
1DX - ~4 year cycles - last version in 2016, newest version announced for 2020 on target
5D - 3-4 year cycles since 5D - last version in 2016, should be due this year; typically released near September
6D - ~4.5 year cycles - last one released in 2017, so we could expect one in 2021
5DS - there's only been one release in 2015, so who knows what a typical release cycle is, though there is no suggestion a new version is coming.
D6 - 4 year cycles - last one was 2016, newest version announced for 2020 on target
D850 - 2-3 year cycles - last version in 2017, newest version should be in 2020
D750 - 6 year cycles - last version in 2014, newest version announced for 2020 on target
D600 - Unsure of cycle, but Nikon openly cancelled this line so I don't see a new one coming
K1 - honestly, who knows if Pentax will even release another full frame camera at this rate, though they did openly say they thought people would
come back to mirrored shooting recently, so I don't see them moving to mirrorless.
a99 - 4 year cycles - last version was 2016, newest version would be due late 2020, though I'll bet it will never be renewed considering the success of their mirrorless line.
I'm blanking on other full frame cameras which have traditionally had an OVF which have not been released, so I would argue that while there is a lot of movement toward mirrorless, we haven't seen a lot of OVF-driven lines miss their scheduled renewals in favour of a mirrorless alternative just yet.