While we would all like another LBT movie, it's not going to happen. Unless the same thing that happened to Power Rangers happens and the rights are bought by some other big company, but I highly doubt it. Thirteen is sometimes an unlucky number, and considering LBT XIII was easily the worst movie in the LBT franchise, Universal most likely finally decided to pull the plug and concern their time with more important projects.
The point is an online petition is not going to change anything, because most people don't care about LBT anymore. You can argue that people still do, but not enough to keep the franchise alive. I'm sorry, I know you put a lot of thought into this, and it would be wonderful if it were to work, but unfortunately it will not.
Now let's say you were to acquire the signature of every person residing in North America, Asia, and everywhere else the LBT is viewed, then you might actually get somewhere. However, I am NOT implying that you do that, because that would be impossible.