We start in a calm, sunny and cheerful day, everything at peace.
With a character (I will Ike in at least this version), walking around that place, he ended up finding a place to rest for a moment it looks like some kind of forgotten fortress with some broken parts letting the sun light being visible but not annoying. Things are nice for a moment, some birds are flying around, we in particular see a orange bird around the other birds (this doesn't initially too important outside of being a non common color compared with the rest of the more white-ish birds)
During a moment the music stops slowly and, the day becomes cloudier and darker, Ike notices something is weird and looks to his sides, nothing it's happening unti he sees he is now surronded for the *insert generic Cruel Arena Enemies, if they're Miis again make them look unnatural and a bit creepy, or at least feel soulless*,
and they're approaching him... Ike maintains and steady position, try to search and blink space, but there are so many
*I don't have idea which music use for the short battle scene, maybe Time Of Action*
A light ball drops from the sky and obliterate some of the enemies, letting Ike go outside his surronded position and now having the advantage (after all is Ike), and completing the fight with the help of this mysterious magician.
Ike looks up to the position of the mage, someone was also here in the fortress, but in a higher ground, he sees a female figure, the camera closes up, and we see Micaiah joining the battle... but isn't done yet, Micaiah decided to go down and approach Ike, they don't have a moment to actually interact because more of these beings are appearing, Ike and Micaiah join forces again to battle them, and then we go to gameplay. I think for this part the music would actually be a remix using these songs: