Some little tidbits I picked out that have better potential... (SPOILER ALERT)
- The capital of the New Republic was destroyed, not the whole thing. The NR still controls the core worlds, which are surrounded by the First Order. There's some very good plot potential there. Maybe we could see some more Legends material return to canon. How about some E-Wings and K-Wings facing off against Star Destroyers? How about the Lusankya brawling it out with a Mandator-IV?
- Thrawn and the Chiss Ascendancy are still canon. With the First Order poking its nose into the Unknown Regions, the Ascendancy might be inclined to intervene.
- Admiral Ackbar might not be dead. We've seen characters survive worse. In the Clone Wars, Admiral Trench survived the exact same fate.
- There's still the Yuuzhan Vong. They were a huge part of Legends material, and it seems beyond criminal to leave them out.