I probably wouldn't try to stretch it that far! One of the main things about Mythic Bastionland is that you've got a number (normally 6) of Myths "active" in the realm at the same time. The weird/mysterious nature of the omens tends to mean a player may not be sure what myth the omen actually pertains to.
Some one-shot/convention guidelines is to include only 1 or 2 myths and make the realm smaller so you it could be considered in that way. Generally I went for a little module that contains one of each of the key elements of the game. A myth (with included site), a Knight and a Seer!