I think adding an entire league is not an easy thing. I think that adding a single game would not be a problem, but to add the whole project for one person is unlikely to succeed. Although I'm curious how the owner of Malubit will respond.
If there are a a huge interest for the game then they will sure add it. If some one else aside from people on the forum wants it then they will mention it through the support chat. No worry on that, Malubit will surely add if there are enough interest. It grants them revenue as well
As I wrote in my previous post, this may not depend directly on Malubit, but on an external company that supports betting odds. Of course, I don't know how the system works on this website, but it seems to me that it is not so simple.