The most likely scenario in which any other surviving Saiya-jin would appear on DBSuper (and we had a few additional ones in the movies, although non-canon ones) would be if they keep the ritual to achieve the stage of Super Saiya-jin God exactly the same as in BoG and need an additional Saiya-jin to join Goku, Vegeta, Gohan, Goten and Trunks. In that case, as suggested by Bulma herself in BoG, they could bring Tarble to the discussion again (although he, along with the entire events of the 2008 special, may have become non-canon just the way BoG and Fukkatsu did) or have either Raditz, Nappa or Bardock revived. This is really a long shot and I think the chances of it happening are more than dim and the overall scenario is utterly far-fetched. If I had to choose, I'd love to see both Raditz and Bardock resurrected, as they belong to Goku's family and I've always wondered throughout the years how Goku would react to Raditz after all those years (he has a tendency to forgive his past enemies and would probably accept him as a member of the team and his blood-brother) and especially how the relationship between Goku and Bardock, his father, would develop. Pure Saiya-jin have a natural tendency to cease from putting a lot of importance in family and blood relationships - Raditz wants to kills his brother and his nephew, Goku helps to kill his brother, Brolly kills his father, Vegeta seems emotionally indifferent to the decease of his father, etc. -, but the fact remains Goku has never seen his father once in his entire life, and Bardock, the other way around, only saw Goku as a baby and is completely unaware of the fact that he went on to become not only a Super Saiya-jin and beat Freeza, but reached entire new stages, defeated/fought toe-to-toe with much more powerful villains/antagonists in the following years and became pretty much one of the most powerful warriors in the Universe.
If they're indeed going for a change in how the stage of Super Saiya-jin God, which is the most likely scenario (although they could also retcon BoG even further and have Pan be born at this point instead of 4 years later and have her become the additional Saiya-jin they need, exactly as seen in the movie), they can either change the number of Saiya-jin needed, change the ritual itself or have the state become a transformation that can be underwent through some other method, such an explosion of anger or intensive training.
Regarding Tarble, I've always had the theory that basically Vegeta - who is deemed a fighting genius on several occasions throughout DBZ - inherited all the good genes from his father, leaving Tarble next-to-nothing (much like in the movie Twins, in which one of the sons is mentally and physically overly gifted and the other one is a dwarf with an attitude problem). If Tarble continues to be canon, or will become canon during DBSuper, we can only conclude that Vegeta neglected even mentioning him to his fellow Saiya-jin, Goku or anybody else, for that matter, on purpose, out of indifference/shame for his disgraceful fighting abilities as a member of his family line. Tarble came to DBZ as an additional surviving Saiya-jin and Vegeta's long-lost brother in an overly fast-paced manner.
We've always been chewing on the "fact" that there were only 4 surviving Saiya-jin from the destruction of Planet Vegeta and the genocide of the race, and indeed we can exclude Paragas, Brolly and Turles, as they show up in movies, which depict, explore and expand on "what-if" scenarios and cannot be considered canon, but Tarble's introduction in 2008 came to change that fact. It's always hard to reshape your mind to change events which you went through the process of accepting as "facts" in DBZ's one and only timeline as canon. It's the same thing, to a certain degree, with having BoG and Fukkatsu no F be retold after having accepted them as canon direct continuations of the Majin Buu arc in DBZ in the 10 year gap between it and the last 3 episodes of DBZ, although we'll basically get the same events, characters and stages - Beerus, Whis, Super Saiya-jin God Goku, Golden Freeza, Super Saiya-jin God Super Saiya-jin Goku, Super Saiya-jin God Super Saiya-jin Vegeta - being introduced just the same although at a different timing and in different circumstances.