Bag 3 starts the aircraft and includes 3 minifigures (2 passengers and a pilot)  The aircraft has the standard wings and fuselage sections.  I am not a fan of the giant wing piece as it limits the number of seats.  It does however help to make the aircraft more realistic.  Given the size of the aircraft, there are only 5 seats for passengers which is rather disappointing.
This set is designed for children aged 6+, and one of the ways that it is suitable for them is the inclusion of separate instruction booklets and numbered bags for the different parts of the set (see my post about LEGO age range suitability here).  A younger modeller can build the plane or other item of their choice as soon as they open the box. It's not so much one big set as 5 different parts which make a whole scene. My 7 year old son chose to build a jet first of all...
In 1997 they had an architectural competition for a new 430,000 ft² (40,000 m²) passenger terminal, designed to serve 3.5 million passengers a year, north of the original airport. KHR Architects won the assignment and completed the construction in co-operation with COWI, and at the end of May 2002 the new passenger terminal was put to use, as the first phase of the future expansion, which is scheduled to take place north of the start and runway, while air cargo services, business and private aviation will continue to be served from the existing buildings south of the runway. In connection with this expansion, the largest since the beginning of the airport, it was with effect from 1 January 1997 turned into a Joint-stock company, Billund Airport A/S, with the former members Vejle County and municipalities Vejle, Kolding, Grindsted, Billund, and Give as shareholders.
Attention then shifts to construction of the three aircraft. When I first spied this set I assumed that the two red jets were the same, but closer examination reveals a number of differences. First up is a red jet with a canard wing configuration as seen in the Saab Viggen amongst others. The lower fuselage is fashioned from a number of double and triple inverted 45 degree slopes with a pair of 1 x 14 Technic bricks running through the centre; there’s no obvious reason for Technic bricks to be used in this situation – standard 1 x 14 bricks would have done the job just as well - so I assume that LEGO just happened to have a bunch of them lying around…. A printed black 1 x 2 tile in the cockpit represents the instrument panel, while a substantial air intake is attached on either side of the fuselage at a 90 degree angle by way of brackets.
If you don’t own Black Panther Pursuit or any of the sets that included Captain America, I guess it would a plus getting the both of them in this set but Super Heroes collectors tend to be completionists, so I think that scenario will be particularly rare. I guess you could always sell your spares on the secondary market, but really, who wants to do that?

Since around 2000, the Lego Group has been promoting "Lego Serious Play", a form of business consultancy fostering creative thinking, in which team members build metaphors of their organizational identities and experiences using Lego bricks. Participants work through imaginary scenarios using visual three-dimensional Lego constructions, imaginatively exploring possibilities in a serious form of play.[73]