All This and Gargantua 2 (Spoilers)
If they had been able to make that the Season V finale (which they apparently wanted to, but ran out of episodes), I'm assuming people wouldn't have been so down on it. That was awesome. So, to recap:
The Investors are dead.
Scott Hall/Zero is dead.
JJ is (likely) dead, and apparently made some sort of deal with The Investors.
General Treister is (likely) dead, and became a Hulk.
Sovereign might be dead.
Killinger is magic, and immortal.
The Guild Resistance was created, and succeeded in overthrowing the Sovereign.
There will be a new Council of 13, containing likely the two remaining members (Dr. Mrs. The Monarch and that guy who's in the shape of a virus), members of the Revenge Society (likely at least Underbheit and Phantom Limb), and others.
The Venture Compound has burned to the ground.
Gargantua 2 is destroyed.
The new Guild headquarters is on an asteroid.
Jonas Venture Sr. is still dead.
The Monarch still can't be on the Council of 13.
And from the epilogue:
The Ventures might be moving to New York?
Rusty inherits another company to run into the ground.
Mrs. Impossible (Mrs. Venture?) gets Spider Skull Island, where she and Ned will likely live.
Pirate Captain is afloat again.
This show is still awesome.