There is nothing in the DCAU that I hate more than the Bruce/Barbara pairing. Just not ok.

She used to know, then she didn't know, then, starting with Hush, she knew again and was his on again/off again lover. And that continued until the reboot.

I'm late to the party but - I really don't think Don saw a vision of a pregnant Megan. He saw a dead Megan. There was just something about the way she said "bye" on the phone that made me feel like that was the last conversation they'd ever have. Plus, the solider was dead. Don was dead before Roger brought him back.