So far Marvel's done a nice job connecting all the recent movies they've been making. Iron Man gave us SHIELD and the Avengers Initiative, Hulk continued by having Stark show up and reference "We" from the end of his film and the stuff used on Blonsky is the Super-Soldier serum used to make Captain America (who is getting his own movie soon). Now they need to do some connections for the Thor movie and we'll be set for Avengers (which can intro Wasp and Ant-Man).