1984 - Unpublished New Mutants cover

1984 - Unpublished New Mutants cover by Bob Layton and Jack Abel

http://www.comicartfans.com/GalleryPiece.asp?Piece=1080108&GSub=146368

Kraven's Last Hunt cover recreations by Mike Zeck

1985 - Anatomy of a cover - Marvel Fanfare #24

 

http://www.coollinesartwork.com/featured.asp?Piece=295170&Details=1&From=Room

X-Men 50th Anniversary Variant Covers

Here's the combined image of all 12 X-Men 50th Anniversary covers:

(Tip of the hat to Gerry Turnbull for finding the combined image!)

And here are the Art Adams (New Mutants) and Walt Simonson (X-Factor) covers.

1985 - Walt Simonson's Thunder Frog

1980 - Anatomy of a cover - Captain America #246

 

By George Perez and Terry Austin. 

The text in the box reads: 

"Okay Guys, I know I must a left a couple of folks out"

1985 - Hulk/Alpha Flight switch/cross over - Amazing Heroes #76