Avengers, The (1963 series) #70

Roy Thomas designed the members of the Squadron Sinister as analogues of DC's Justice League heroes Green Lantern, Superman, Batman and Flash. But Grand-Master modelled them on members of the alternate universe Squadron Supreme, to be introduced in #85-86. Roy was reusing the name of a WWII Timely speedster Whizzer, who himself will resurface in the present in Giant-Size Avengers #1. The Avengers don't know that Iron Man is Tony Stark. (Except that scenes in the later Avengers Classic #3 and Mighty Avengers #21 establish that Hank Pym (currently Yellowjacket) found out long ago.) The Avengers Index says that Iron Man is from a time after Stark has recovered from his current heart attack in IM#19. The various versions of the Index disagree as to whether the 3 Avengers have been transported to that time, or all 4 characters have been taken to a different time. (The 2nd version would at least explain how Iron Man knows when and where to show up.) It isn't clear whether all 4 of the Squadron aim to steal or destroy their target buildings, or just to defeat their opponents. Black Knight moved to England as seen in Dr Strange #178 as a consequence of discovering his ancestry in Marvel Super-Heroes #17. When the Squadron next appear as a team working for Nebulon in Defenders #13-14, Nighthawk switches to the heroic side and joins the Defenders. (In between he will appear in Daredevil #62.) Before that, Iron Man #63-66 will reveal that the Power Prism is actually a Skrull, and by the time of the Defenders appearance it will have passed to a new owner. In a later appearance of Hyperion it will be claimed that Grand-Master created him from nothing and implanted the memories of the destroyed atom world.