While DpRevived is a good name for bringing people over from DPReview, that's a short term gain. Over the long term the site might be better off with a name that reflects the inherent value of the site, rather than sticking with a name that builds off a defunct site, that new members may not have heard of.
Obviously, whatever name is chosen, I would keep the name DMRevived for a year or two, and have it redirect to the permanent name.
I haven't given it much thought, but perhaps a name like "resource.photography" would be a better long term name.
There are lots of top level domains. The site is not limited to a domain name ending in ".com".