It's a little bit homage, a little bit non-Mantloverse. The Incredible Hulk #313 defines the Crossroads as a conjunction of many different realities. The Alpha Flight from AF# 29 on (IMO) belongs to the Mantloverse. Volume 4 in particular ties itself to that particular version of Alpha Flight.

Bureaucracy was Mac's biggest enemy, just as "continuity" is Alpha Flight's.
The Mostly-New, Mostly-Different AF1