I've mentioned it before, but I've been collecting the Marvel hardcover series, Marvel Premiere Classics. (Hmm... come to think of it, that could explain the title of this thread.)
The latest one (at this writing) is 51: Avengers: Under Siege, and includes Avengers #272, Guest Starring Alpha Flight! - the Atlantis crossover issue.
To date, from memory, the Alpha references have been:
12: Kitty Pryde and Wolverine, which includes Logan learning about the death of James Hudson
34: Mephisto Vs, which has a single-panel cameo of a then-dead Snowbird in Mephisto Vs. X-Men
41: Iron Man: Iron Monger; #s 195 and 196, with Shaman
44: Avengers: West Coast Avengers Assemble; Puck is on the cover of #1
45: Avengers: The Contest, which contains Contest of Champions (I just scanned a panel for another thread).
46: Infinity Gauntlet which mentions the death of the team (they got better)
51: Avengers: Under Siege, which includes Avengers #272 - the Atlantis crossover.
In case this is of interest.
- Le Messor
"He's so dense, light bends around him."