This is an ominous development for Earth-2 story lines. I don't think they will cancel the series for good. Probably start over with a new #1 after the war.
Yes, there appears to be some sort of reboot coming. The last page in the latest issue is almost a farewell ad (or at least I read it that way). I glimpsed over at newsarama and read about the new Worlds' Finest. Not sure if there is a place for a separate Earth 2 book. If so, please ..please..please. get rid of the Batman/Superman centric stories. DC has a plethora of other books devoted to those 2.