I've actually been a bit anxious/worried over "5G" and the potential relaunch or reboot(though for the moment at least, I'm going to take Jim Lee's word at face value they do not intend to do reboot with the characters undergoing a mass age up. Whether that was the original plan and they're the changing the "5" of "5G" into a near future subline or that was their plan to begin with, or whatever happens, we'll see). But, anyway I've tried to make chart to help my analysis and theorizing.
https://docs.google.com/spreadsheets...it?usp=sharing
It includes most currently ongoing in continuity series, plus Death Metal, and Green Lantern Season 2, for reference, starting from the may solicitations and shows their projected numberings should they survive until January, assuming the continue with current frequency of publication, when GL Season 2 is scheduled to end. Miniseries in general and alternate publishing labels not included. Supergirl, confirmed to be cancelled with #42 in May, is not included. The timing with the relaunch was suppose to occur in fall around the the time of Death Metal concluding(in October), and Green Lantern being truncated to 8 issues to accommodate the relaunch(in September, which has been reversed and it will now again run until January)
I also read rumors of several series concluding upon their 50th or 100th issue. Series reaching this point before the approximate time of the rumored relaunch.
Batgirl, with issue #50, in August
Red Hood & Outlaws, with issue #50, in September(The same month GL was supposed to reach it's truncated conclusion.)
Justice League, with Issue #50 in July
Batman, with issue 100 in August
(I find it hard to believe these last two would be cancelled a good two-three months before the rumored relaunch. Red Hood and the Outlaws does seem to be winding down. I believe it ending at #50 to be likely. I cannot comment on Batgirl.)
Teen Titans would not reach issue #50 until January.
If anybody wants to put in their own two cents on which series may be cancelled at what point, or whether the a change in plans behind the scenes may lead to certain series being saved or extended, be my guess.
Also if anybody notices errors in my chart, please feel free to correct me.