I known about the latest changes in listing requirements and strategies of Coinbase, but it takes time and a hard journey for altcoins, including Stellite to get there.
Of course, as other members in the Stellite community (in fact, I mined thousands of Stellite coins) I hope that the team can bring the coin to Coinbase some day.
However, it might take huge efforts and very long period of time to be there - might be years.