Marvel doesn't reboot.
I dont think they have had any.
They have a sliding timeline. where events in the past happened... but on a shifting timeline.
Peter wasn't bitten by a spider in 1963 anymore, it was 1993. (or so.)
peter isn't 16, he is now 23. he has aged 10 years or so over the last 40.
Same with the Xmen for example. The Xmen are all grown up. Cyclops is 32, etc.
Now, individual characters have some retcons, and reboots. One more day for peter, removed his marriage, job, and about 8 years of age.
Magneto is like 34 again... yeah. clones..
nu52 is largely a mess. Editorial mandates. the script has been rewritten repeatedly. The whole flashpoint paradox event is no longer relevant. not even kidding. the giant event that started the nu52, has been retconned out already. oops. It was supposed to be an Age of Apocalypse type deal.
A few books are better for the nu52. SoS, Demon knights, Wonder woman, Aquaman.
some just ignored it. Batwoman, Batman Inc for example. just laughed and kept going as if nothing happened. good books.
Some are flat out worse. Booster is gone. PG is horrible. Ravagers, Teen Titans, Red Hood all terrible, and horrible characters now. Superman is no longer married to lois lane. hes banging Wonderwoman. I shit you not.
Earth 2 stuff is good. as an elseworld its more enjoyable to have new characters, or old characters acting different.
Jla is awful. WW is completely out of character with her own book. and its fucking ww+superman shipping. Trinity having sex with each other is the world plot ever.
Lots of books died early. Unless you have the word Batman in your title, you are subject to cancellation.
If you like Batman, there are 23 books you can choose from though! (Im including Batwoman, Batgirl, Catwoman, Harley quinn, Sirens, Red Hood, Suicide Squad etc..)
Overall comic sales are up I hear though.