The latest previews of of Dragon Ball Super Manga #77 just dropped and it reveals a little bit more of the story. Apparently the Namekians lived with the Cerealians on the planet until Frieza’s minions descended on the planet with the Saiyans instantly turning into Oozaru’s destroying everything in sight. In the last seen we see someone running away with a Great Ape with a gash on his face similar to Bardock looking on.
The next chapter will release in a week so I look forward to seeing the whole chapter.