No further information or clarification was provided. Moreover, the developer did not offer any preliminary development renders. Based on the above quotation, I can only assume that both airports are to be combined into a single package. Keep in mind, although both are located in Italy, they are nowhere near each other.
Please note, the below capture is a real world photo from Umbria by Paolo Ficola.
To review the original announcement, see the source post via the developers Facebook page.
On a related note, back in late December, RFscenerybuilding also released Zagreb Airport for FSX and Prepar3D.
*Image courtesy of Paolo Ficola.