I'm late to the whole party but I've been reading. Observing. Speculating a bit of my own.
I wasn't able to find much about the ARG since I'm an old n00b here, but it seems fairly obvious that the prose on each of the final images is referring to a celestial body in the Solar System.
Day One: Sol
Day Two: Earth
Day Three: Venus
Day Four: Jupiter
Day Five: Mercury
Day Six: Mars
Day Seven: Pluto
Alpha Lupi's post of "7 - Only the trusted few..." could have meant that only these seven planets will be featured in Destiny. Yet, each count down could allude to a Destiny of some sorts (ex: "2 - Pushed to this place for a reason..." means it was DESTINY to have been pushed there).
Only thoughts I have on what I know and have learned at the moment.
However, has anyone overlaid the Final Image mosaic over the Puerto Princesa map to look for correlating points or coordinates? maybe it's showing each planet or body's corresponding range of gravity; gravity well? "Something is falling towards you. Or are you falling towards it?" Also, Wikipedia interestingly enough said that Alpha Lupi is the Tenth Star of Imperial Guards in the Chinese Root constellation. The Traveler guards humanity, right?
So... Are we falling towards the Traveler? or is the Traveler falling towards us?
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Day 1 (Moon) - The poem doesn't have much information correlated to any planet. Day 2 (Mars) - The poem mentions red rock. Day 3 (Mercury) - The poem mentions one side that is hot, and one that is cold. Seeing as how Mercury is closest to the sun, it fits, there is also some concept art that leads me to believe Mercury will be playable. Day 4 (Jupiter) - Mentions it's the biggest body. Jupiter being the biggest planet in our solar system, this makes sense. Day 5 (Venus) - Talks of a hot ocean, this coincides with the concept art of Venus. Day 6 (Saturn) - The poem talks of many moons and comets, Saturn has a lot of moons, also it being a gas planet, it talks of the chaotic nature of the planet. Lighting and what not. Day 7 (Sun) - Talks about the burning blaze. I believe the poems are from the Traveler's perspective, not mankind's.