"eridium maximums increased."
A full changelog is expected to be published "sometime this week" for everyone to stare at. The new Vault Hunter Krieg drops in May with the fourth and final story DLC in June.
Something called the Ultimate Vault Hunter's Mode will be released freely in a patch, which is due April 2nd.
For those with a Season Pass a second patch will release the same day taking the level cap from 50 to 61 and adding a new Pearlescent weapon rarity - on its own it'll cost $4.99.
"There will be inventory/backup/storage increases in the update (Free update). More ammo SDU's will be available in the black market along with eridium maximums increased," a Gearbox dev. "Chris will have a full list of the changes sometime this week for everyone. He also is going to get the Krieg forum up sometime this week."