They created a FAQ explaining some stuff about modding and multiplayer:
http://steamcommunity.com/app/332310/discussions/0/615085406675832629/Some important info taken from the FAQ:
Will LEGO Worlds have Online Multiplayer?LEGO Worlds will have Online Multiplayer later in 2015, possibly early 2016 depending on our progress with all features. It is to be included as a more final feature, as we want to ensure that all mechanics and features we add into the game over the Early Access schedule function in Multiplayer to their maximum potential!
We will detail how Multiplayer will function at a later date.
Will LEGO Worlds support Mods?Right now, we are not supporting Mods, and we want to ensure that we get the base game working correctly for everyone first. We will explore supporting Mods at a later date once we are satisfied (and you are satisfied) that the game is stable enough to consider opening up these avenues.
Please also bear in mind that any Modding currently breaches the terms of the EULA, meaning we will not be able to assist you if a Mod damages your game in any way.
It’s also worth noting that we will be making massive amounts of changes of the Early Access schedule, and that Mods that work now, may break down the line, or possibly cause issues with your game data later. We strongly suggest that you do not modify the game files at this time!
Will there be Micro-Transactions in LEGO Worlds?There will be no Micro-Transaction in LEGO Worlds. We will also not even begin to consider offering any additional paid content until we have satisfied our community during Early Access.
