Rumors are rumors. The things are still for sale.
I think the timing is wrong to make a decision on whether the rumors may be true or false. The logical time to see a refreshed Wi-Fi product lineup would be later this year, when HomePods go on sale. The more I think about it, the more I believe Apple may overhaul its entire wifi ecosystem at that time. (Perhaps the current AirPort team was reassigned because this hypothetical project is in the hands of an entirely separate team?)
It seems to me that Apple is downplaying HomePods' ability to function as a smart home hub. Perhaps the "Home" in HomePods refers more closely to HomeKit than we've been lead to believe (might Apple have its own line of smart lights, locks, thermostats, etc. in the works?). If so, the quality of the wifi network becomes even more important to the success of Apple's products. It seems very un-Apple for them to abandon such a key part of the infrastructure just at the time they're becoming more reliant upon it. On the contrary, end-to-end control of the wifi experience becomes even more important.
The same is true regarding expanded dependence on cloud-based services (today, iCloud Photo Library, Apple Music streaming, and the Mac's Documents and Desktop folders, tomorrow, iCloud Time Machine??). A poor wifi network means trouble with the backup.
Competitively, it's not easy for Apple to sell base station-style routers - most cable/DSL installations come with a service provider-supplied router. To me, it makes more sense for Apple to offer ways to improve the performance of the existing network.
The demands being put on the home wifi network are only going to increase. The single-router home is becoming harder to sustain - that router is almost always located wherever internet service enters the home, rather than the location that would allow for the best radio coverage. If there are multiple wifi-dependent devices in every room, range extenders in particular become more important. Well, not only range extenders, but supplemental networks (like Sonos BOOST) - dual-band routers may not be enough.
This fall might be a good time to introduce a refreshed AirPort Express - Express has not yet been upgraded to 802.11ac, while AirPort Extreme and Time Capsule have been. It may also be time to offer media server/DVR capabilities - if iPad is all the computer a person needs, Mac-as-media-server is the wrong approach.
My prediction is that we'll see two new/upgraded products in the fall - an easy-to-setup range extender, priced around $50-$75 (AirPort Express without the I/O ports and base station capability), and an 802.11ac AirPort Express. Maybe also a media server with Time Machine capabilities playing second-fiddle. I'm also thinking that, perhaps, Apple has chosen to not yet announce that HomePod's smart home hub capabilities include a built-in range extender.
A further prediction is that, as with AirPods, Apple will add some proprietary hardware capabilities that will make the setup/addition of Apple wifi-enabled devices even easier than using AirPort Utility - something that beats Sonos' setup procedure. If they follow this route, expect the capability to be added to every new wifi-equipped Apple product.