Capcom hosted a showcase stream revealing upcoming content for Monster Hunter Wilds. The next two months are filled with a variety of content, and the showcase stream provided a glimpse of that!
Mizutsune Returns!

The biggest addition for Update 1 would probably be the return of the lovable bubble shooting, spike tail, monster, Mizutsune. To get the quest, you must be HR21 or above, head to the Scarlet Forest and talk to Kanya for the quest. All the best in hunting this monster in newer gens!
The Grand Hub

Exclusively for HR16 hunters, the new hub is a gathering place packed with more activities and socializing for hunters do take part it. Capcom mentioned new activities for hunters to interact, including arm-wrestling and barrel bowling.
Zoh Shia Rematch

Remember the main story boss? With title 1 update, you’ll be able to re-fight Zoh Shia through new quests after reaching HR50. What’s better? You can craft new armor from this new quest! -At the moment, no sneak peek of Zoh Shia armory
Arena Quest

Another old feature returns! What’s Arena Quest? If you feel like the better hunter, Arena Quest is the place to be. Compete with other hunter for the fastest time completion for a specialized Quests. Rewards will be given to participants and special rewards will be given to the best of the best hunters.
Alma cosmetic pack?

You can change how Alma looks or wear. That’s about it.
More and More!
DLC
A mixture of free and paid DLC will also be included in the Title Update 1. Mainly emotes and cosmetic. For Hunters who wish to drip out, this random mixture of DLC sets is for you to wait!
Event Quests and Seasonal Events
More event quests will be available alongside Seasonal Events. Seasonal Events theme Festival of Accord: Blossomdance on April 23rd, the Grand Hub will change its appearance, available meals will also change. Limited equipment, gestures, decorations, and more are available during these seasonal events.
Capcom has also confirmed that previously available events and events quests will return in the future too!
Summary of a Summary (Road Map)

To sum up the summary once more, here’s the road map.
Title Update 2