There are 3 cardboard boxes with more Easter eggs. We get a few references to Marvel organisations such as A.I.M., who you may remember from Iron Man 3 as an R&D agency run by Aldrich Killian, Hammer, one of Stark Industries primary rivals which made an appearance in Iron Man 2, bankrolling Whiplash and finally a box with the Stark Industries logo on it.
The two stunt jets included here actually have some similarity in the basic design and colour scheme to the main piece seen in the Marvel Super Heroes Avenjet Space Mission set. With that being said, I loved the Avenjet in that particular set, so any similarity holds no issue with me. The red and white colours work really well together, and it looks like something you would genuinely see flying through the sky at an air show. I really love it when LEGO truly capture the essence of what you are building, and they do that here. The jets themselves, as I said before, are similar to previously-released jets, and therefore the builds won’t come as any main surprise. That shouldn’t detract from the product, however, as it is a prime example of LEGO finding a winning formula and not really needing to change it.