Well it looks like Dennis Calero will be starting earlier than expected. Last issue, issue 14 now marks the end of Andrea's run on the series and the new year kicks off with new artist, Dennis Calero with issue 15.
I, Vampire 15 Preview
Judging by the preview, while their are some obvious differences between the two, the transition is actually not that bad though I think his Andrew can look a bit more impressive, but I'm sure it'll get there as the issues go on though we will surely miss Andrea.
I, Vampire 15 will be out this Wednesday, January 2nd.