So at gearbox's PAX panel they announced quite a few new additions that will be coming in the following months to Borderlands 2. I haven't seen anyone make a thread on it yet so I figured I'd summarize it here.
First of all, on April 2nd a level cap increase and a 3rd playthrough will be made available. This will raise the current level cap of 50 to 61 meaning more skill points and higher level guns. The 3rd playthrough is called Ultimate Vault Hunter Mode and it will feature the return of pearlescent rarity guns exclusive to levels 51-60. It is confirmed that you do get a skill point for every new level. In addition to this there will also be an update which gives more storage capacity, more ammo SDU's to get, and an increase in max eridium. This extra content will be free to season pass holders, and $5 for everyone else.
Next, the new dlc character is a psycho bandit named Krieg. His action skill is a buzzsaw melee attack that can be thrown as a ranged attack as well. When you get a kill while in his action skill mode your health instantly refills. He's supposed to be an aggressive high risk, high reward, playstyle. They tried to focus on making abilities you've seen psychos use available to you with his skill trees. If you want to be a burning psycho, now you can by taking a skill that gives you a chance to ignite yourself when dealing fire damage and gain bonuses from doing so. An overall theme of his class is negatives becoming positives. He has one skill that gives you bonuses for taking damage for example. He'll be available sometime in May, cost $10, and is not included in the season pass. Below are two videos of his gameplay reveal.
Next up, there will be a fourth story dlc coming "before June is over". They said that it is the biggest add-on they've done yet including those made for Borderlands 1. This will be included in the season pass. They didn't have much to show for it except for a teaser of Tiny Tina, Brick, Mordecai, and Lilith playing a table top rpg called Bunkers and Badasses.
Finally, a new version of the Loot Chest will be available on the gearbox store. It's similar to the one that came in the limited edition, but with some different stuff inside. It'll have a goliath replica mask and a code to get this mask in game, vault hunter wanted poster, playing cards (these are legendary loot cards, have codes on them to get legendary items in the game), window decals, and a certificate of authenticity. That'll be available for $99 in May if any of that interests you.