makes sense
1. epic was on two sony conferences to show the engine but on no microsoft conference
2. we still didn't hear about a game from epic for next gen consoles and they surely work on something. if it would be multiplat i think we would already know about it
3. if you have an own engine it makes sense to make a game for only one console so that you can squeeze more out of it. because you want it to look as impressive as possible.
4. they all left epic games because they heard their next game is for ps4 (just joking)