DC looks like they are just doing some housecleaning and not resetting numbers across the board. Books that are staples like Batman, Superman, Detective Comics, Wonder Woman, etc. aren't renumbering they are going to keep going (all are at issue 41 right now).
Overall there will be 25 comics that were being released before convergence that will continue being ongoing series and not renumbered to number 1.
- Action Comics by Greg Pak/Aaron Kuder
- Aquaman by Cullen Bunn/Trevor McCarthy
- Batgirl by Cameron Stewart/Brenden Fletcher/Babs Tarr
- Batman by Scott Snyder/Greg Capullo
- Detective Comics by Brian Buccelato/Francis Manapul
- Batman/Superman by Greg Pak/Ardian Syaf
- Catwoman by Genevieve Valentine/David Messina
- Deathstroke by Tony Daniel/Tony Daniel
- Flash by Rob Venditti/Van Jensen/Brett Booth
- Gotham Academy by Becky Cloonan/Brenden Fletcher/Karl Kerschl
- Gotham By Midnight by Ray ****es/Juan Ferreyra
- Grayson by Tim King/Tim Seeley/Mikel Janin
- Green Arrow by Ben Percy/Richard Zircher
- Green Lantern by Robert Venditti/Billy Tan
- Harley Quinn by Amanda Conner/Jimmy Palmiotti/Chad Hardin
- Justice League by Geoff Johns/Jason Fabok
- Justice League United, writer TBD/Travel Foreman & Paul Pelletier.
- Lobo by Cullen Bunn/Cliff Richards
- Secret Six by Gail Simone/Dale Eaglesham
- Sinestro by Cullen Bunn/Brad Walker
- New Suicide Squad by Sean Ryan/Carlos D'Anda
- Superman by Gene Luen Yang/John Romita Jr.
- Superman/Wonder Woman by Peter Tomasi/Doug Mahnke
- Teen Titans by Will Pfeifer/Kenneth Rocafort
- Wonder Woman by Meredith Finch/David Finch
Then there are 24 new series coming out that will all be number 1 issues. They are:
- Robin, Son of Batman by writer/artist Pat Gleason
- Black Canary by writer Brenden Fletcher and artist Annie Wu
- Martian Manhunter by writer Rob Williams and artists Ben Oliver and Paulo Siqueira
- Earth 2: Society by writer Daniel H. Wilson and artist Jorge Jimenez
- Midnighter by writer Steve Orlando and artist ACO
- Bat-Mite by writer Dan Jurgens and artist Corin Howell
- Batman Beyond by writer Dan Jurgens and artist Bernard Chang
- Cyborg by writer David L. Walker and artists Ivan Reis and Joe Prado
- Dark Universe by writer James Tynion IV and artist Ming Doyle
- Doomed by writer Scott Lobdell and artist Javier Fernandez
- Harley Quinn/Power Girl by writers Jimmy Palmiotti, Amanda Conner and Justin Gray with artist Stephane Roux
- Red Hood/Arsenal by writer Scott Lobdell and artist Denis Medri
- Starfire by writers Jimmy Palmiotti and Amanda Conner, with artist Emanuela Lupacchino
- We Are Robin by writer Lee Bermejo and artists Rob Haynes and Khary Randolph
- Justice League of America by writer/artist Brian Hitch
- Bizzaro by writer Heath Corson and artist Gustavo Duarte
- Prez by writer Mark Russell and artist Ben Caldwell
- Omega Men by writer Tom King and artist Barnaby Bagenda
- Mystic U (tentative title) by writer Alisa Kwitney and artist Mauricet
- Section Eight by writer Garth Ennis and artist John McCrea
- Dr. Fate by writer Paul Levitz and artist Sonny Liew
- Green Lantern: Lost Army by Cullen Bunn, art by Jesus Saiz and Javi Pina.
- Justice League 3001 by Keith Giffen, J.M. DeMatteis and Howard Porter
- Constantine: The Hellblazer by Ming Doyle and Riley Rossmo
This isn't the first time DC has cleaned house. They have done similar things since the launch of the New 52 back in 2011. Every 6 months to they have ended some series and added new ones in, and every couple of years they have had a large number of books end and new ones begin.
The biggest difference in this change that I can see if that they won't be calling it "the new 52" anymore, which make sense since its now 4 years old. The line of books will be called "DC You".
New number 1 issues always sell a lot and make for easy jumping on points so both companies renumber series on the regular when there are new creative teams. DC seems to have held off on this more than marvel lately and when there was sea change in creative for Batgirl and Wonder Woman continued with the numbering rather than go back to a number 1. DC has also (so far) kept to the new 52 numbering without reverting back to the old numbering for anniversary issues. Issue 19 of Detective Comics would have been issue 900 in the old numbering. They did make it a oversize anthology issue but actually resisted to renumber the issue to 900.
Anyways if you are coming back into comics the next month or two is a good time to pick up new series from DC as there are a lot of new series you can start and older series that are starting new arcs. For the continuing ongoing series most are starting their new story arcs with issue 41 (I know batman and Superman are) so they are also good places to jump in.
It's still pretty confusing and without searching through comic sites its impossible to know when a new story arc is starting. A good site to go to is
http://comiclist.com They have the full schedule of comics that come out that week and the next week.