If not, its very odd as a purely random choice
The heroes are often destined to defeat the evil as "Warriors of Light" and occasionally gather as a direct result of the antagonist's malicious actions
It would make more sense to have more tutors for artifacts in decks instead, since a tutor for artifacts can search for both Vehicles as well as other types of artifacts (hint: Boommobile can combo off with two other artifacts Cogwork Assembler and Panharmonicon)
Effects that modify the creature's power and/or toughness without setting base power and/or toughness will apply to the creature no matter when they started to take effect
Wherever the purchases are made, it looks to be a fun game featuring a lot of familiar characters from the world of Disney
For example, if one of the exiled cards is a land card, you may play it only during your main phase while the stack is empty and only if you have an available land play remaining