So during the treehouse there was a small tidbit/show off about their new online systems. When in the Wild Lands, local and online players can roam with you, but they can also challenge you to battle, to trade and get items. This is nice for two big reasons for me, first one being Co-Op is FINALLY in Pokemon to some extent, sure it might be superficial, but having a friend to hunt with will be fun. The 2nd biggest thing is if you can do this with randoms, it will make the place feel way more alive, basically random encounters and trades with real people, the over world is essentially a big hub at that point for hunting pokemon and battles/trades with other trainers.
The footage for the treehouse Time Stamped:

The footage for the treehouse Time Stamped: