No 64-bit variant this time, according to this report from The Register, a new core named "Appalbred" could make it to the market to replace current Durons.
Appalbred will initially ship in three forms: 1400, 1600 and 1800, priced at $32, $39 and $47, respectively.
AMD's official price list contains just two desktop Durons, at 1.2GHz and 1.3GHz, priced at $39 and $44, respectively. If the Appalbred information is correct, it would indeed appear to be a Duron replacement - or at least a new core for the old brand.
I'm not too sure if this makes much sense given the rest of AMD plans, what could be interesting would be AMD entering the low-power league to combat current and upcoming processors from Intel and Transmeta.