Likelihood of a second MLP set?

The mlp collab has been my first skullpanda purchase, as I absolutely loveeee the designs. Since I haven’t been around for many releases, I was curious what the odds are that they release another wave of characters in the future?

I think a Luna and celestia would be sooo cute (I’m surprised those weren’t the secrets) and there are so many other characters that would lend themselves nicely to a second set!

Have they ever done a collab in the past where they’ve released multiple sets together? Or do you think this will be a one time thing? I tried searching for other collabs but couldn’t find anything other than the Sanrio, so is this one of their first?

Really want to see more, I love them!!!