I keep seeing this shot on covers, but I haven't found the source yet. I don't know if it's a painting, movie poster, earlier cover I found yet, or what.
The earliest cover I have found so far (thanks to help from FB group Comic Swipes) is The X-Men vs. The Avengers #4. Closer to the shot on the Power Rangers covers (and most of the others) is the Iron Man 3 movie poster (May 3, 2013).
There's also this interior image from Iron Man #169 (April, 1983):
(7/87) The X-Men vs. The Avengers #4.
(9/95) Iron Man #320. (From a different angle, and the helmet is upside down, but it sort of looks like the pose)
(7/07) Iron Man: Hypervelocity #5.
(12/09) Invincible Iron Man #19.
(10/13) Iron Man #14.
(1/16) Mighty Morphin Power Rangers #0. (plus variants)
(11/16) Mighty Morphin Power Rangers #9. (variant)
(2/17) Infamous Iron Man #3.
(12/17) Mister Miracle #3. (and 2nd print variant w/red background)
(3/18) Mighty Morphin Power Rangers #25. (plus variants)
(5/18) Lady Death: Apocalyptic Abyss #1. (Not a helmet, but same idea)
(7/18) Star Wars #48.
(6/19) Mighty Morphin Power Rangers #40. (variant)
(7/19) Mighty Morphin Power Rangers #41. (variant)
(8/19) Mighty Morphin Power Rangers #42. (variant)
(9/19) Mighty Morphin Power Rangers #43. (variant)
(10/19) Mighty Morphin Power Rangers #44. (variant)
(11/19) Mighty Morphin Power Rangers #45. (variant)
(12/19) Mighty Morphin Power Rangers #46. (variant)
(1/20) Mighty Morphin Power Rangers #47. (variant)
(2/20) Mighty Morphin Power Rangers #48. (variant)
(3/20) Mighty Morphin Power Rangers #49. (variant)
(7/20) Mighty Morphin Power Rangers #51. (variant)
(7/20) Mighty Morphin Power Rangers #52. (variant)
*******(10/20) Mighty Morphin Power Rangers #55. (variant)
(12/18) Tony Stark: Iron Man #5. (variant)
