I don't get it. Russell hasn't done jack crap. Why was he invited? 
You can tell that Frank is doing more than drawing names out of a hat. He's sending guys over who are going to have an increased leadership role the next season.
you can tell that based on martin sending sutton last year and kicking him off the team this year?
He's sending players who are going to be relied more upon the next season. In the case of Sutton, he obviously didn't fulfill what Martin and others expected of him (at least off the court) and was thrown off.
We all know that Samuels will be a bigger cog in next years team. That he sent Russell along with him should tell you something.