Apparently, as we see in the first chapter of E-2, Flash will have literally the speed of Mercury, making his origin more mystical. That make think how a lot of the characters from the original earth two (the one from the 40's) were more mystical based while their counterparts were more close to sci-fi concepts(GL and Hawkman, Dr. Fate, the Spectre, among others). That make think if magic in this new earth-2 would be more stronger than the main earth (or Earth-1, or Prime or whatever name has now) and which other characters would be magically connected.
Still, we don't know yet if GL origin will be more mystical or if Hawkgirl is a reincarnated princess (as their previous incarnations), but their presence could be an indication in some fashion.