CAPY, the developers of "Below", appear to have confirmed that a lot of what we saw at E3 were timed exclusives.
"Like many games on stage at E3, Below will be available on the Xbox One first. Then, after a period of time, CAPY can bring it elsewhere. It’s always been this way."
Which games could they be? Also, how many is many?
I'll put the guesses here. They have to be games on stage at E3 said to be on Xbox One first. If the developers have commented on exclusivity I'll add links.
Titanfall - "It's definitely not out of the question"
Dead Rising 3
Plants vs. Zombies: Garden Warfare
Ryse: Son of Rome
Fantasia: Music Evolved (Kinect)