In the opening cutscene, when the Glukkons are viewing the screen displaying the failing profits, there's a picture of a Glukkon on the screen with "Lulu" underneath him-- it was only brief so I couldn't tell what the point was but I assume it was a reference to the Lulu we meet in MO
Also on one of the slidey tutorial screens there was an alert to all employees that there's an infestation of BoomBats (I think!) that we see in SW. There's two to start you off.....! Oh, and sometimes an annoyed Mudokon will call Abe Stitch Lips.