(1) Are the upcoming Typhon Pact books (and are there just four of them?) being released in chronological order, or do they pretty much occur simultaneously post-"Losing The Peace", seeing as they appear (or appear to me from what little I know of them, that is) to each represent a different facet of Trek (i.e. TNG, DS9, et al)?
I gather that they are in roughly chronological order and are not simultaneous, spanning several months overall.
Myriad Universes: Shattered Light
(2) Is there supposed to be a third Myriad Universes book due out this year? And when? Yes, I realize that is actually two questions...
is scheduled for December, according to Memory Alpha.
(5) Are what I've heard described the upcoming Aventine books the same as the Typhon Pact miniseries? Or am I mistaking one for the other?
There is only one scheduled book focusing on the Aventine
(though not exclusively), and it is part of the Typhon Pact
series. Rumors of a series of Aventine
books are greatly exaggerated.