Actually, they are NOT stupid questions.
Whether or not he changes sizes is NOT a given, because it is a VISUAL change, one that might not be implemented in an ALttP style remake of OoT. Condidering that 2D Zelda characters are traditionally one square block high rather than 2, that means that the adults and children are usually the same size. Meaning that if Link were to grow, it would make him a giant compared to all the other adult characters, unless of course the other adults were also 2 blocks high.
As for Epona, I realize it is a 99% certainty she is in it. The only reason I ask is because it is a departure from normal 2D gameplay, and rather than really being a question of whether she would be in it, it was more meant to be a question of how it would be implemented.
You don't need to be rude about it.
Anyways, is Majora's Mask GB still going, or did you scrap the project? I've been trying to figure it out, but haven't found a real answer.