1.  How do the mainland elves fit in?

The elves on the mainland generally govern themselves and keep to themselves, but it is not extremely rare for elves to be seen in cities on some errand or another.  The Pope didn't discriminate in his call for adventurers despite how others feel about elves.

2.  Will the party get uber magic items, weapons, armor, etc. at every turn?

While magic items in Arcadia are not uncommon, many "magical" properties are gained through the item's material.  For example, mithral might add +5 AC to a suit of armor signifying it's much harder than regular iron armor.  There are some powerfully crafted/enchanted items in Arcadia but they are harder or more expensive to obtain.  Even harder to obtain will be legendary artifacts-- unbreakable and everlasting in strength.  You try and keep track of a sword for 50,000 years without losing it.

3.  Will a timeline of history be available?

Only if I get enough requests, in order to help clarify the history presented.

5.  Did you make up these questions yourself?

I don't know what you're talking about.