Correct - the hanger can only accommodate the biplane. That having been said, in order to accommodate the other aircraft too the hangar would have to be huge, with an enormous footprint, and a substantially increased parts count. As a result, I'd estimate a price up to double the current RRP which I suspect few of the target market would pay. LEGO therefore got the size of the hanger right IMHO.
This brings us to the main reason most people will get this set. The Giant Man figure. What a revelation. Lego could’ve simply released him as one of their larger scale figs like The Hulk or Thanos. Instead they’ve really outdone themselves and designed a brick built figure that looks like a regular minifig grew really big. Huzzah! There are quite a few stickers to apply, but it’s so fun to build him and put him next to the others. On the negative, they could’ve done something to spruce up his back. From the front he’s almost perfect but you turn him around and you just see the bottom of his constituent parts. It’s a minor negative on an otherwise impressive feature, however.
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.