You asked if Tyranids had anything in the rumor mill, and almost immediately this hit. I was holding it to see if more information would unfold, but alas, nada.
So here is a quick one on just when we might see something Tyranid.
This is a rumor, so please take with a dash of salt
I originally heard that was going to be the last 40K release this year. But lots of folks seem to think Sisters have taken this slot.
I think they will either be last release this year or first next year and sisters will be in the other slot.