All the information contained below was confirmed during the April 27 Warriors Den livestream. Below is a link to the recording. It is just over an hour long.
https://www.twitch.tv/videos/138442327

For Honor Release Schedule - http://i.imgur.com/YsWnzMO.jpg

Season 2, Shadow and Might, begins May 16th, after a 3 week offseason. Season 2 will add new content to essentially every aspect of the game’s multiplayer.
New Cosmetics. No screenshots yet.

2 New Maps. Only been a few teaser images, but nothing beyond that. One appears to be the Samurai Marshland map from single player, while the other is a Knight map with lava.
		Stream Teasers
	- http://i.imgur.com/NH726E6.jpg


A New rarity level for gear, as well as new items. No screenshots.

2 New Heroes: The Centurion, and the Shinobi. They will be available to play to season pass holders instantly on the 16th. Everyone else will have to wait a week, and pay a 15K steel price to play them in multiplayer or v AI matches.
		Stream Teasers
- https://clips.twitch.tv/TrappedProductiveQueleaHassanChop
	- http://i.imgur.com/FV8CgdN.png

	There were also multiple leaks before the stream, which all now seem more likely, due to lining up with released information.
	- CENTURION MOVESET
		http://i.imgur.com/FRJSbrT.png
	- HERO CONCEPTS
		https://i.imgur.com/VZebJqW.png
	- HIGHLANDER LEAK
		http://i.imgur.com/lgoYQgd.jpg