We're glad you like it so far :D
For the course of this game, since it is our first game, we're going to keep the scale relatively small. We're going to keep to the same 4 characters, and depending on your choices you'll meet each of them in different orders, sometimes different parts of the factory, with different dialogue and scenes. Once we have several of these paths complete we'll consider the game "complete" and release version 1.0 and plan our next move.
One option, if this game does well and people like it enough, which so far we're kind of amazed by the response, will be to add another group of characters to meet. So maybe we'll up the number of party goers from 4 to 7 or 8, as kind of a free dlc expansion. In there we'll probably add more secrets, more options for classic characters, and stuff like that.
The other option is a completely new game that takes place in Isola's egg factory. We already have a bit of that planned out and we're excited to show off more of this weird and provocative world. One way or another, there will be more games that'll definitely have features like what you were asking about.
So hopefully you enjoy what we have planned for the future, because there's a lot to come :)