Mr. Cessna,
I agree with you that the Cessna 152 is an excellent little trainer. I've got lots of happy hours tooling around in Cessna 150's and 152's with students, landing in fields, chasing deer, inspecting fields, and experimenting. They're great airplanes, and very economical, as well as easy to maintain.
I really don't think that you'll see them return to production. The modern student wants something that looks modern, and even cars have turned to electronic display screens for instrumentation. My mini-van has touch screen controls and all kinds of gadgets. I have no idea how to work them, but it sells, and my wife loves it.
Many today consider the 152 to be old fashioned. I disagree, and I think it could easily soldier on with little more than a face-lift, but Cessna won't go into production again based on what I think, or the hundreds of airplanes I can't buy to make it worth their while.
With airplanes such as the Katana and the Cirrus on the market, the face of new airplane sales is slowly switching to more modern designs, with more modern instrumentation, more advanced materials, and newer and more developed motors.
The 152's big drawback is it's size; it's not comfortable for many adults, and the straight-leg feature of sitting without sitting makes it even more uncomfortable for some. A natural step away from the 152 is the 172, which has an actual seat and a little more room than the 152. It also makes a good student trainer, and a very economical airplane in general.
I prefer the analog instruments, and the older airplanes. Of course, from an ownership point of view, when one is stuck with an expensive gyro replacement or instrument overhaul, the electronic gear with its' much greater mean times between failures looks very good. For now, airplanes with analog instruments and a few years and hours on the airframe are still available, and a whole lot less expensive than the modern tricked-out aircraft. They're getting harder to find as rentals, but it does mean that for some, they've become more available, affordable alternatives to the overpriced plastic junk that's on the market today.