What we Know:

-Out in 2021
-Ever since VW bought Lamborghini in 1998, they've employed some sort of "model cycle"
for every model. It's unnecessary right now explain it all, but get this: There's
always a special edition that previews the next model. The Reventon previewed the
Murcielago successor (Aventador). The Sesto Elemento previewed the Huracan, and the
Centenario previewed the Aventador successor. That's a good thing if you're a fan of
those crazy diffusers.
Point is: It's going to resemble the Centenario A LOT.

-Naturally aspirated V12
-Heavier
-Some kind of Hybrid System
-Up to 1,172 hp

I'm guessing it'll look like a cross between the Centenario and the new Sian that was just revealed.

-electric and hybrid version

Another upcoming model due to come out in about 2 years or so is the Huracan EVO Performance version. Another thing Lamborghini likes to do is:

1. Make a model
2. Performance Version of that model
3. Mid cycle revision
4. Performance version of that revision.

Take the Aventador for example. The Performance version of the old LP700 is the SV. The mid cycle revision is the Aventador S, and the performance version of that is the SVJ. The EVO is the Huracan's mid cycle revision. The LP610 and LP580 have been moved into the "Past Models" category on Lamborghin dealer's websites. So, expect an EVO Superleggera or something like that.