Italiaracing had a couple of interesting rumours, reporting that Jimmy Eriksson (ex-GP2) is testing for Lazarus. I can't be sure if that was for GT Open though.
Supposedly Raffaele Marciello was in advanced negotiations to partner Giovanni Venturini in a Lambo in GT Open, but that less certain now he has tested for AKKA-ASP (Blancpain GT).
http://www.italiaracing.net/newsint....=227069&cat=17