Yeah, it would be nice. I do expect GW to only primarise the Chapter Masters of each chapter for now, but given that Tigurius got primarised as well in the Ultramarines, maybe we will get more than only Azrael in the new size. In any case, this project currently only pertains to older models.
Once I have finished my project army (and I have actually updated the ARMY GALLERY post with a diagram on what that project contains, in case anyone wants to check it out), I'll see about making a new company into the chapter, which includes the Primaris Marines. Or start a new army. Or change factions. Or even go to Age of Sigmar. I don't know yet. I'll cross that bridge when I get to it. But I am holding out from going full into primaris marines for as long as I can, so as to wait until the models are all there and available.