Wondering about the interrelations of the various X-Books over at Marvel? Axel Alonso lays out the internal thinking behind them:
With the Marvel NOW! X-Men line, it was pretty clear out the gate that “All-New X-Men” — which focused on the Lee and Kirby X-Men, returned to the present — would be the core X-Men series, and that the “Uncanny X-Men” would now focus on Cyclops and his band of mutant revolutionaries. Once these two pieces were in place, we knew what space was left for other series. ” Wolverine and the X-Men” stayed focused young mutants at the Jean Grey School, struggling to find their place in the universe. [Editor] Daniel Ketchum and [writer] Si Spurrier relaunched “X-Men Legacy” so Legion replaced Rogue as the core character. [Editor] Jeanine Schaefer and [writer] Brian Wood redefined adjectiveless “X-Men” as an all-female X-Men team. And [X-Men Group Editor] Nick Lowe conferred with two writers — Sam Humphries and Dennis Hopeless — and saw the potential for two X-Force titles: “Uncanny X-Force,” which focused on two characters from Rick Remender’s run, Fantomex and Psylocke, and “Cable & The X-Force,” which focused on a team of X-Men that became fugitives for a crime they didn’t commit. The goal was to provide enough variety in the line that a reader could decide what they want to read.
I get that the Bendis/Immonen/other artists pairing makes All-New X-Men a flagship book for Marvel, but I admit; I’d not thought of it as the core X-book, because it doesn’t feature the characters that we’ve been following for years as regular lead characters (with the exception of Kitty). For me, Wolverine & The X-Men was the core book, in that it hews closest to the original concept and centers around “today”‘s incarnations of the characters, not a time-tossed retro team. Another reason, perhaps, why I’m not the editor-in-chief of the most successful comic book publisher in America.