There are lots of possibilities and avenues that can be taken with an alternate Earth concept. I'm hoping they will go wild and take risks with it instead of playing it safe and making it more-or-less what the Pre-Crisis Earth-2.
Suddenly, some of DC's recent reprint decisions make sense, like the Infinity, Inc.
and All-Star Squadron
collections. While I'm personally excited by these, I wasn't seeing a lot of relevance to the current state of the DCU in dredging up stories of Earth-2.