Talk:Flight to the Finish/@comment-10390252-20131210103403

So, Meghan McCarthy made a Tweet in which she gave a sequence of numbers (see the EqD post on the subject) . Consensus amongst most fans is that they're episodes which she thinks we need to watch closely. This episode, #5 in the airing sequence, is the first. What does everypony think this means?

My best guesses are:

1) Season meta-plot is addressed (either the keys or the recurring villain);

2) One of the fairly heavy load of songs for this season will feature in this episode.

Whilst I hope it's #1, episode 7 (which may include "Apples to the Core") is also in the list, so #2 is also plausible.

What does everyone else think?