Perhaps. I wouldn't be surprised.
I like to think that the new modular Mac Pro will be a scalable Mac that can be configured from Mini-spec to Pro-spec and everything in between, essentially replacing the current headless Macs with one single machine. Or at the very least that Apple will recycle the trashcan Mac and upgrade it with consumer parts and give it a second life as an affordable Mac.
But logically I shouldn't expect either of those options to become a reality. The likely case is that the mini is dead and the iMac will be the only option for us.
At any rate, even if there's a new Mini. Will we still be able to trust Apple with updates? What if the next mini is the last one? Or at the very least takes another 5 years before the next version is released. Do you really want to buy into a dead platform?