Spoilers for the upcoming Dragon Ball Super manga chapter 68, have revealed the origins of Granola and have hinted that Goku’s biological family will play a key role in the upcoming arc. This means that yes, there’s a possibility the three could be reunited in Dragon Ball Super.
Granola, the new Dragon Ball Super villain that reached Seven-Three in the previous chapter, derives from one of the many alien races that the Saiyan’s conquered during their time under the rule of Frieza. However, Granola’s people weren’t just attacked by any Saiyan’s, they were attacked by Bardock. Yes, the father of Goku is the man who slaughtered his people, which means that he has a big grudge against Goku, as well as Goku’s family.
Then, you also have to remember that Vegeta is the son of King Vegeta, who probably made the order to attack Granola’s planet and the fact that both Vegeta and Goku are semi-allies with Frieza now, who was also involved. As you can see, there is a lot of motivation here for Granola to want to harm the Saiyan’s.
Meanwhile, it has already been confirmed that Bardock’s past actions will play a big part in the upcoming arc and Goku will have to finally face the horrors that his family had inflicted on others in the past. This could lead Goku to finally meeting his parents in Bardock and Gine as an adult, as well as a possible reunion with his brother Raditz.
The Saiyan’s could be brought back to life by Goku to help against Granola. It could be for a reason that only Bardock could help with, such as information about that alien race and their abilities but I’m just speculating here about that. A simple trip to hell could also allow Goku to extract that hypothetical information too. Another reason for them being resurrected is Granola might want to inflict some pretty dark revenge against Bardock an his family.
Imagine resurrecting Bardock and his family, only to kills off Gine, Raditz, Goku, Goten, Chi-Chi, Pan, Videl and Gohan before killing him too afterwards. As you can see, there’s a real possibility that Goku could be reunited with his Saiyan family in this upcoming manga arc either in this world or the next.