HQ: Wakanda Palace - Talk to Green Goblin as Spider-Man.
HQ: Secret Bunker 2 - Talk to Iron Man as Captain America or Mr.
HQ: Secret Bunker 2 - Talk to She-Hulk as Captain America, Penance.
HQ: Secret Bunker 2 - Talk to Firestar as Penance.
HQ: Secret Bunker 2 - Talk to Captain America as Iron Man or Mr.
HQ: Secret Bunker 1 - Talk to The Thing as Invisible Girl or Human Torch.
HQ: White Star 3 - Talk to Cloak as Captain America.
HQ: White Star 3 - Talk to Cable as Jean Grey, Captain America, Gambi, Iceman, Storm or Wolverine.
HQ: White Star 3 - Talk to Luke Cage as Captain America.
HQ: White Star 3 - Talk to Captain America as Luke Cage.
HQ: White Star 2 - Talk to Prodigy as Captain America.
HQ: White Star 2 - Talke to Iron Fist as Captain America or Luke Cage.
HQ: White Star 2 - Talk to Firestar as Captain America.
HQ: White Star 2 - Talk to Captain America as Luke Cage.
HQ: White Star 1 - Patriot as Captain America.
HQ: White Star 1 - Talk to Hercules as Captain America.
HQ: White Star 1 - Talk to Spider-Woman as Captain America.
HQ: White Star 1 - Talk to Captain America as Luke Cage.
3 - Talk to Maria Hill as Iron Man or Mr. 2 - Talk to Black Widow as Iron Man or Daredevil 1 - Talk to Bishop as Iron Man, Storm, Iceman, Gambit, Deadpool, Jean Grey or Wolverine Fantastic as Human Torch or Invisible Girl
HQ: Stark Tower 2 - Talk to Iron Man as Captain America.
HQ: Stark Tower 2 - Talk to Captain America as Iron Man.
HQ: Stark Tower 1 - Talk to Wolverine as Jean Grey, Storm, Iceman or Gambit.
HQ: Stark Tower 1 - Talk to Black Widow as Daredevil.
Here's a complete list of the Special Conversations you can have in each HQ.