Star Wars Legends (formally the Star Wars Expanded Universe) already had lots of events set after Star Wars VI: Return of the Jedi.
Did Star Wars VII: The Force Awakens explicitly contradict any of those events? If yes (most likely), what are they?
NOTE: some of the suggested events were NOT explicitly contradicted by canon.
- Imperial Remnant could still have happened.
- Mara Jade could still have happened (that might change by Episode VIII of course).
- Even Han and Leia having twins is NOT directly contradicted by new canon — nowhere does it say Ben didn't have a twin (we know Rey isn't that twin as she is 10 years younger)